Preliminary Geologic Map of the San Bernardino 30' x 60' quadrangle, California

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What does this data set describe?

Title:

Preliminary Geologic Map of the San Bernardino 30' x 60' quadrangle, California

Abstract:

The San Bernardino 30'x60' quadrangle, southern California, is diagonally bisected by the San Andreas Fault Zone, separating the San Gabriel and San Bernardino Mountains, major elements of California's east-oriented Transverse Ranges Province. Included in the southern part of the quadrangle is the northern part of the Peninsular Ranges Province and the northeastern part of the oil-producing Los Angeles basin. The northern part of the quadrangle includes the southern part of the Mojave Desert Province. Pre-Quaternary rocks within the San Bernardino quadrangle consist of three extensive, well-defined basement rock assemblages, the San Gabriel Mountains, San Bernardino Mountains, and the Peninsular Ranges assemblages, and a fourth assemblage restricted to a narrow block bounded by the active San Andreas Fault and the Mill Creek Fault. Each of these basement rock assemblages is characterized by a relatively unique suite of rocks that was amalgamated by the end of the Cretaceous and (or) early Cenozoic. Some Tertiary sedimentary and volcanic rocks are unique to specific assemblages, and some overlap adjacent assemblages. A few Miocene and Pliocene units cross the boundaries of adjacent assemblages, but are dominant in only one. Tectonic events directly and indirectly related to the San Andreas Fault system have partly dismembered the basement rocks during the Neogene, forming the modern-day physiographic provinces.
Rocks of the four basement rock assemblages are divisible into an older suite of Late Cretaceous and older rocks and a younger suite of post-Late Cretaceous rocks. The age span of the older suite varies considerably from assemblage to assemblage, and the point in time that separates the two suites varies slightly. In the Peninsular Ranges, the older rocks were formed from the Paleozoic to the end of Late Cretaceous plutonism, and in the Transverse Ranges over a longer period of time extending from the Proterozoic to metamorphism at the end of the Cretaceous. Within the Peninsular Ranges a profound diachronous unconformity marks the pre-Late Cretaceous-post-Late Cretaceous subdivision, but within the Transverse Ranges the division appears to be slightly younger, perhaps coinciding with the end of the Cretaceous or extending into the early Cenozoic. Initial docking of Peninsular Ranges rocks with Transverse Ranges rocks appears to have occurred at the terminus of plutonism within the Peninsular Ranges. During the Paleogene there was apparently discontinuous but widespread deposition on the basement rocks and little tectonic disruption of the amalgamated older rocks. Dismemberment of these Paleogene and older rocks by strike-slip, thrust, and reverse faulting began in the Neogene and is ongoing. The Peninsular Ranges basement rock assemblage is made up of the Peninsular Ranges batholith and a variety of metasedimentary rocks. Most of the plutonic rocks of the batholith are granodiorite and tonalite in composition; primary foliation is common, mainly in the eastern part. Tertiary sedimentary rocks of the Los Angeles Basin crop out in the Puente and San Jose Hills along with the spatially associated Glendora Volcanics; both units span the boundary between the Peninsular Ranges and San Gabriel Mountains basement rock assemblages.
The San Gabriel Mountains basement rock assemblage includes two discrete areas, the high standing San Gabriel Mountains and the relatively low San Bernardino basin east of the San Jacinto Fault. The basement rock assemblage is characterized by a unique suite of rocks that include anorthosite, Proterozoic and Paleozoic gneiss and schist, the Triassic Mount Lowe intrusive suite, extensive deformed and undeformed Cretaceous granitic rocks, the Pelona Schist, and Oligocene granitic rocks. Internal structure of the assemblage includes the Vincent Thrust Fault, at least two old, abandonded segments of the San Andreas Fault system, and extensive areas of well-developed to pervasively mylonitized rocks.
The main body of the San Gabriel Mountains is bounded on the north by the San Andreas Fault and on the south by the Sierra Madre-Cucamonga Fault Zone. East of the San Jacinto Fault, the San Bernardino basin is an asymmetric pull-apart basin bounded by the San Andreas Fault on the east, and underlain by many of the same rock units that characterize the San Gabriel Mountains. Cretaceous and older rocks of the San Gabriel Mountains basement rock assemblage are divided into two structurally and lithologically distinct groups by the Vincent Thrust Fault, a regional, low-angle thrust fault that predates intrusion of Oligocene granitic rocks. The Vincent Thrust separates the Mesozoic Pelona Schist in its lower plate from highly deformed gneiss, schist, and granitic rocks in the upper plate. The fault, along with its far-offset, dismembered analogs in the Orocopia and Chocolate Mountains east of the Salton Sea, may underlie much of southern California.
Crystalline rocks between the Mill Creek Fault and the main trace of the San Andreas Fault Zone range from highly deformed gneiss of unknown age to relatively undeformed Mesozoic biotite-hornblende diorite. They are overlain by Miocene sedimentary rocks and cut by the Wilson Creek Fault, that is considered to be an older segment of the San Andreas Fault system. Crystalline rocks of this basement assemblage are similar to rocks in the Little San Bernardino Mountains to the southeast, and appear to have been displaced about 50 km by the Wilson Creek and Mill Creek Faults.
About 80 to 85 percent of the San Bernardino Mountains bedrock assemblage in the quadrangle is Mesozoic granitic rocks, and the rest, highly metamorphosed and deformed Late Proterozoic and Paleozoic metasedimentary rocks. There is a pronounced gradient from east to west, and to a slightly lesser degree from south to north, in the magnitude of both deformation and metamorphism of the Late Proterozoic and Paleozoic metasedimentary rocks. In addition to the east to west gradient of increasing metamorphism and deformation, east of the quadrangle there appears to be a sharp break between highly deformed and relatively undeformed Late Proterozoic and Paleozoic rocks.
Late Proterozoic and Paleozoic units comprise a thick sequence of metasedimentary rocks generally consisting of a lower quartzitic sequence and an upper carbonate rock sequence. The entire lower quartzitic part is Late Proterozoic and Early Cambrian, and includes the Stirling Quartzite, Wood Canyon Formation and Zabriskie Quartzite; the upper carbonate rock sequence includes the Cambrian Carrara and Bonanza King Formations, the Devonian Sultan Limestone, the Mississippian Monte Cristo Limestone, and the Pennsylvanian Bird Spring Formation.
Mesozoic intrusive rocks in the San Bernardino Mountains and southern Mojave Desert include numerous Triassic and Jurassic plutons. The Triassic rocks are relatively alkalic and quartz deficient, and contrast with the voluminous, quartz-rich, calc-alkalic Cretaceous granitic rocks, which make up the largest part of the San Bernardino Mountains assemblage. The voluminous tonalitic rocks in the San Gabriel Mountains and Peninsular Ranges assemblages are essentially absent in the western San Bernardino Mountains. Many areas of dominantly Cretaceous granitic rocks are mapped as Mesozoic mixed-rock units, because they are extremely heterogeneous, and include large components of older rocks.
The relatively young, active San Andreas Fault system is by far the dominant structure in the San Bernardino quadrangle. Based on offsets of many of the rock units found in the San Bernardino quadrangle, different amounts of lateral displacement have been proposed for the San Andreas Fault system within and south of the Transverse Ranges. The Neogene evolution of the Transverse Ranges Province, and its relationship to the San Andreas Fault system in particular, are complicated by several abandonded segments and the shifting locus of the fault during the late Cenozoic. Most recent structural interpretations require relatively large rotations within the Transverse Ranges Province.
Other active faults in the quadrangle include the San Jacinto Fault and the reverse faults bounding and within the Transverse Ranges. Older faults considered to be abandoned segments of the San Andreas Fault system include the San Gabriel Fault, Punchbowl Fault, Mission Creek Fault, and Wilson Creek Fault. The Vincent Thrust and Squaw Peak Fault are both older faults, the Vincent probably of late Mesozoic to early Tertiary age.

Supplemental_Information:

The contents of this report consist of the following:

1. Geologic map database
2. Plot files for five sheets:
  Sheet 1 Geologic map
  Sheet 2 Correlation of Map Units
  Sheet 3 List of map units
  Sheet 4 Fault map
  Sheet 5 Three figures, including index map, physiographic provinces map, and sources of data
3. A pamphlet containing:
  a. A detailed Description of Map Units
  b. A discussion of the regional geologic framework
  c. Photographs of many rock units and geologic features

Map nomenclature: Within the geologic map database, map units are identified by standard geologic map criteria such as formation-name, age, and lithology. The authors have attempted to adhere to the stratigraphic nomenclature of the U.S. Geological Survey and the North American Stratigraphic Code, but the database has not received a formal editorial review of geologic names.
Map plot: Some contacts are very poorly located or are gradational over a very wide interval. Many of these contacts would normally be shown as scratch contacts, but at 1:100,000 scale lead to unclear map relationships. For the purposes of clarity, these scratch contacts are drawn on the map plot with a short dashed line. Dune crests within units Qoed3 and Qyed1 are mapped and recorded in the database, but are omitted from the geologic map plot file, because they obscure unit contacts. Dikes making up unit Kg are mapped and recorded in the database, but are omitted from the geologic map plot file because they are too concentrated and plot as a mass of indistinguishable lines. Intra-unit grain-size boundaries within generic Quaternary units are recorded in the database, but are in most cases poorly defined and poorly located, because the contacts are anastamosing and gradational. They also are omitted from the geologic map plot file.

How might this data set be cited?
Douglas M. Morton (compiler), and Fred K. Miller (compiler), 2003, Preliminary Geologic Map of the San Bernardino 30' x 60' quadrangle, California: U.S. Geological Survey Open-File report 03-293, U.S. Geological Survey, Menlo Park, California.
Online Links:
- http://pubs.usgs.gov/of/2003/of03-293/
What geographic area does the data set cover?
West_Bounding_Coordinate: -118.00593183
East_Bounding_Coordinate: -116.99999913
North_Bounding_Coordinate: 34.50409269
South_Bounding_Coordinate: 33.99593574
What does it look like?

http://pubs.usgs.gov/of/2003/of03-293/images/sb.gif (GIF)
Reduced-size image of the entire map sheet, 425x332 pixels, 72k bytes
http://pubs.usgs.gov/of/2003/of03-293/sanbern_map.pdf (PDF)
Navigable portable document format file (.pdf) image of the geologic map
Does the data set describe conditions during a particular time period?

Beginning_Date: 2001

Ending_Date: 2003

Currentness_Reference:

Publication date
What is the general form of this data set?
Geospatial_Data_Presentation_Form: map
How does the data set represent geographic features?
1. How are geographic features stored in the data set?
  This is a Vector data set. It contains the following vector data types (SDTS terminology):
  - Point (20256)
  - String (51013)
  - GT-polygon composed of chains (20270)
2. What coordinate system is used to represent geographic features?
  
  Grid_Coordinate_System_Name: Universal Transverse Mercator
  Universal_Transverse_Mercator:
  UTM_Zone_Number: 11
  Transverse_Mercator:
  Scale_Factor_at_Central_Meridian: 1.0
  Longitude_of_Central_Meridian: -117.50
  Latitude_of_Projection_Origin: 34.00
  False_Easting: 0
  False_Northing: 0
  
  Planar coordinates are encoded using coordinate pair
  Abscissae (x-coordinates) are specified to the nearest 0.000000191346
  Ordinates (y-coordinates) are specified to the nearest 0.000000191346
  Planar coordinates are specified in Meters
  The horizontal datum used is North American Datum of 1927.
  The ellipsoid used is Clarke 1866.
  The semi-major axis of the ellipsoid used is 6378206.4.
  The flattening of the ellipsoid used is 1/294.98.

How does the data set describe geographic features?

Entity_and_Attribute_Overview: Version 1.0 of the San Bernardino 30' x 60' quadrangle comprises nine ARC/INFO coverages, of which four contain geologic data, one contains cartographic features, three provide base-map, DLG-derived, reference data, and one contains the distribution of constituent 7.5' quadrangles: sanbern_geo (geology), sanbern_str (structural point data, fold axis and line ornamentation), sanbern_dk (dikes as linear elements), sanbern_flt (faults and annotation), sanbern_carto (geologic unit annotation, locality names), snbrn_hypso (hypsography), snbrn_hydro (hydrography), snbrn_transp (transportation and cultural data), and snbrn_quds (32 constituent 7.5' quadrangles).
In addition to the customary software-defined attributes in each feature attribute table, user-defined attributes are included that allow the user access to more detailed geologic information including unit name, grain size where applicable, and rock assemblage. Two lookup tables are included: rockunit_color.lut (rockunit color assignment) and rockunit_pattern.lut (rockunit pattern assignment).

sanbern_geo.pat

Entity_and_Attribute_Detail_Citation:http://pubs.usgs.gov/of/2003/of03-293/SB100K_pamphlet.pdf
Polygon feature attribute table that stores alphanumeric symbols for units that characterize lithologic type and age of earth materials represented by each polygon, color assignment, unit name, subunit, and grain-size where applicable.

LABL

Rock-unit label

Value	Definition
Cbk	Bonanza King Formation
Cc	Carrara Formation
Cw	Wood Canyon Formation
Cz	Zabriskie Quartzite
Ds	Sultan Limestone
JTrgb	Gabbro and pyroxenite
Ja	Granodiorite of Arrowhead Peak
Jc	Leucocratic quartz monzonite of Crystal Creek
Jcr	Cataclastic rocks
Jd	Quartz monzodiorite of Dry Canyon
Jgf	Granodiorite and quartz monzonite of Fern Canyon
Jhc	Quartz monzodiorite of Hutak Canyon
Jrr	Biotite quartz monzodiorite of Redonda Ridge
Js	Leucocratic hornblende syenite
Jsc	Fine-grained rocks of Silver Canyon
Jwm	Monzodiorite of White Mountain
KJc	Quartz monzodiorite of Crestline
KJdd	Quartz monzonite of Dawn O'Day Canyon
KJdg	Mixed diorite and gabbro
KJgm	Mixed granitic rocks, gneiss, and quartzite
KJhb	Hornblende-biotite granodiorite
KJhs	Mixed granitic rocks of Hopi Spring
KJos	Mixed granitic rocks of Oak Spring
KJqd	Quartz-bearing diorite
KJsc	Quartz diorite of Sand Canyon
KJsp	Mixed granitic rocks of South Peak
KJta	Tonalite of Ord Mountains
KPrm	Mylonitic orthogneiss related to Vincent Thrust Fault
KPzsg	Schist, gneiss, monzogranite, and granodiorite
KPzst	Schist, gneiss, and tonalite
KPzt1s	Mixed tonalite, Unit 1 and schist
KPztm	Mixed tonalite and marble
KPztms	Mixed tonalite, marble, and schist
KPzts	Mixed tonalite and biotite schist
KTrmm	Mixed monzogranite and leucocratic monzonite
Kao	Granodiorite of Angeles Oaks
Kaw	Alaskite of western Granite Mountains
Kbf	Monzogranite of Burnt Flats
Kbfg	Box Springs plutonic complex, biotite granodiorite and tonalite
Kbfgi	Box Springs plutonic complex, biotite granodiorite and tonalite containing abundant inclusions
Kbft	Box Springs plutonic complex, biotite-hornblende tonalite
Kbg	Box Springs plutonic complex, porphyritic granodiorite
Kbgt	Box Springs plutonic complex, heterogeneous granodiorite and tonalite
Kbhg	Box Springs plutonic complex, heterogeneous porphyritic granodiorite
Kbht	Box Springs plutonic complex, heterogeneous biotite tonalite
Kbm	Heterogeneous, leucocratic biotite monzogranite
Kbp	Monzogranite of Butler Peak
Kbt	Box Springs plutonic complex, biotite tonalite
Kcc	Monzogranite of City Creek
Kcd	Sedimentary rocks of Cosy Dell area
Kcdc	Sedimentary rocks of Cosy Dell area, conglomerate
Kch	Charnockite
Kcm	Tonalite of Circle Mountain
Kcr	Monzogranite of Coxey Road
Kcs	Monzogranite of Cloudburst Summit
Kcsl	Monzogranite of Cloudburst Summit, leucocratic unit
Kd	Diorite, undifferentiated
Kdc	Granodiorite of Dorr Canyon
Kdd	Deer diorite of Alf (1948)
Kdh	Monzogranite of Devils Hole
Kdp	Monzogranite of Deadman Point
Kdqd	Diorite and quartz diorite, undifferentiated
Keh	Tonalite of Elephant Hill
Kg	Granitic dikes, undifferentiated
Kgb	Gabbro
Kgc	Mylonitized leucogranite
Kgd1	Granodiorite, Unit 1
Kgdb	Biotite granodiorite
Kgdc	Biotite granodiorite, Cajon area
Kgdp	Granodiorite
Kgdt	Granodiorite and tonalite, undifferentiated
Kgl	Mixed leucocratic and granitic rocks
Kgp	Tonalite of Ganesha Park
Kh	Granodiorite of Hanna Flat
Khc	Granodiorite of Hook Creek
Khl	Heterogeneous leucocratic granitic rocks
Khr	Hybrid rocks
Kht	Heterogeneous tonalite
Kk	Monzogranite of Keller Peak
Kkc	Monzogranite of Kinley Creek
Kl	Leucocratic granitic rocks
Klg	Leucocratic granite dikes
Klmg	Leucocratic muscovite monzogranite
Klv	Heterogeneous granitic rocks of La Verne area
Kmbb	Biotite monzogranite
Kmc	Monzogranite of Malony Creek
Kmg	Monzogranite and granodiorite
Kmgt	Monzogranite and tonalite, undivided
Kml	Mixed mafic and leucocratic granitic rocks
Kmp	Monzogranite
Kms	Monzogranite of Muddy Spring
Kmx	Mixed granitic rocks of Heaps Peak
Kpg	Monzogranite of Punchbowl Fault area
Kpm	Porphyritic biotite monzogranite
Kr	Rattlesnake Mountain pluton of MacColl (1964), even-grained monzogranite
Krl	Leucocratic rocks of Rattlesnake Mountain pluton of MacColl (1964)
Krp	Rattlesnake Mountain pluton of MacColl (1964), porphyritic monzogranite
Ksa	Quartz diorite of Mount San Antonio
Ksgr	Tonalite of San Gabriel Reservoir
Kss	Tonalite of San Sevaine Lookout
Kssg	Mixed tonalite of San Sevaine Lookout and gneiss
Kssm	Mylonitized tonalite of San Sevaine Lookout
Kssm1	Mylonitized tonalite of San Sevaine Lookout, Unit 1
Kt	Tonalite
Kwc	Granodiorite of Willow Creek
Kwcy	Monzogranite of Willow Canyon
Mm	Monte Cristo Limestone
MzPrb	Mixed metamorphic and granitic rocks of Big Dalton Canyon
MzPrd	Gneiss of Devil Canyon
MzPrl	Mixed granitic rocks, quartzite, and schist of Lizard Springs
MzPrm	Mixed granitic and metamorphic rocks
MzPzm	Mixed granitic and metasedimentary rocks, and gneiss
Mzc	Diorite of Cram Peak
Mzdy	Diorite, Yucaipa area
Mzfg	Foliated granitoid rocks
Mzg	Granitoid rocks
Mzga	Orthogneiss of Alger Creek
Mzgd	Gneissic granodiorite of Holcomb Ridge
Mzggm	Foliated gabbro, granodiorite, and monzogranite
Mzgr	Biotite monzogranite of Big John Peak
Mzgy	Mesocratic granitoid rocks
Mzh	Monzogranite and granodiorite of Holcomb Ridge
Mzhg	Heterogeneous granitic rocks, San Gabriel Mountains
Mzi	Inclusion-rich granitoid rocks
Mzmg	Mylonitic and cataclastic granitoid rocks
Mzmx	Mixed mafic rocks and monzogranite
Mzog	Heterogeneous hornblende-biotite orthogneiss
Mzp	Pelona Schist, undifferentiated
Mzpa	Pelona Schist, amphibolite grade unit
Mzpb	Pelona Schist, biotite-quartz schist unit
Mzpg	Pelona Schist, greenstone unit
Mzpm	Pelona Schist, marble unit
Mzpq	Pelona Schist quartzite unit
Mzpr	Gneiss of Pinyon Ridge
Mzps	Pelona Schist, muscovite schist unit
Mzsl	Mixed granitic rocks of Silverwood Lake
Mzu	Mesozoic granitic rocks, undivided
PPbs	Bird Spring Formation
Pra	Anorthosite
CPrcc	Shay Mountain metamorphic complex of MacColl (1964), biotite schist of Cox Creek
Prgc	Coarse-grained biotite granite augen gneiss
Prgd	Foliated to gneissic granodiorite
Prgm	Medium-grained biotite granite augen gneiss
Prgn	Layered gneiss, undifferentiated
Prgn1	Layered gneiss, Unit 1
Prgn2	Layered gneiss, Unit 2
Prgn3	Layered gneiss, Unit 3
Prgn4	Layered gneiss, Unit 4
Prgn5	Layered gneiss, Unit 5
Prgn6	Layered gneiss, Unit 6
Prgnd	Dioritic gneiss or amphibolite
CPrgsq	Shay Mountain metamorphic complex of MacColl (1964), mixed gneiss, schist and quartzite
Prgt	Pelitic gneiss of Troop Peak
Prgu	Granulitic gneiss, mylonite, and cataclasite
CPrlsm	Shay Mountain metamorphic complex of MacColl (1964), Quartzite of Little Shay Mtn
Prm	Granulitic gneiss, mylonite, and cataclasite, retrograde
Prpv	Gneiss of Pleasant View Ridge
Prpva	Gneiss of Pleasant View Ridge, augen gneiss
CPrqc	Shay Mountain metamorphic complex of MacColl (1964), quartzite and calcsilicate rocks of Little Pine Flat
Prsc	Stirling Quartzite, carbonate-rich rocks
Prscq	Stirling Quartzite, carbonate and quartzite member
CPrsm	Shay Mountain metamorphic complex of MacColl (1964), Gneiss of Shay Mountain
Prsq	Stirling Quartzite, quartzite member
Prsu	Stirling Quartzite
Pza	Amphibolite
Pzmb	Marble, San Bernardino Mountains
Pzmg	Marble, San Gabriel Mountains
Pzmp	Marble, Peninsular Ranges
Pzqg	Quartzite, San Gabriel Mountains
Pzsg	Metasedimentary schist and gneiss, San Gabriel Mountains
Pzsp	Biotite schist and gneiss, Peninsular Ranges
QTfz	Crushed rock in fault zones
QTjh	Juniper Hills Formation, undifferentiated
QTjha	Juniper Hills Formation, arkosic sandstone unit
QTjhb	Juniper Hills Formation, arkosic breccia unit
QTjhc	Juniper Hills Formation, clay-shale unit
QTjhcs	Juniper Hills Formation, conglomeratic sandstone unit
QTjhf	Juniper Hills Formation, fine-grained unit
QTjhp	Juniper Hills Formation, playa deposit unit
QTjhr	Juniper Hills Formation, red arkose unit
QTjhs	Juniper Hills Formation, siltstone unit
QTjhsb	Juniper Hills Formation, sedimentary breccia unit
QTjhv	Juniper Hills Formation, volcanic clast unit
QTpp	Phelan Peak deposits of Weldon (1984), undifferentiated
QTpp3	Phelan Peak deposits of Weldon (1984), Unit 3
QTs	Conglomerate, conglomeratic arkose, and clayey arkose
QTstcq	San Timoteo beds of Frick (1921), quartzite-bearing conglomerate member
QTstr	San Timoteo beds of Frick (1921), Reche Canyon member
QTstu	San Timoteo beds of Frick (1921), upper member
Qa	Very young alluvial-valley deposits
Qa1	Very young alluvial-valley deposits, Unit 1
Qab	Very young alluvial-valley deposits
Qac	Very young alluvial-valley deposits
Qaf	Artificial fill
Qb	Sedimentary breccia of Meisling (1984)
Qc	Very young colluvial deposits
Qdg	Disturbed ground
Qe	Very young eolian deposits
Qf	Very young alluvial-fan deposits
Qf1	Very young alluvial-fan deposits, Unit 1
Qf1b	Very young alluvial-fan deposits, Unit 1
Qf2	Very young alluvial-fan deposits, Unit 2
Qf2b	Very young alluvial-fan deposits, Unit 2
Qfb	Very young alluvial-fan deposits
Qfg	Very young alluvial-fan deposits
Qh	Harold Formation
Ql	Very young lacustrine deposits
Qls	Very young landslide deposits
Qoa	Old alluvial-valley deposits
Qoa1	Old alluvial-valley deposits, Unit 1
Qoa2	Old alluvial-valley deposits, Unit 2
Qoa3	Old alluvial-valley deposits, Unit 3
Qoc	Old colluvial deposits
Qoe	Old eolian deposits
Qoed3	Old eolian deposits (dune sand), Unit 3
Qoes3	Old eolian deposits (sheet sand), Unit 3
Qof	Old alluvial-fan deposits
Qof1	Old alluvial-fan deposits, Unit 1
Qof1a	Old alluvial-fan deposits, Unit 1
Qof1b	Old alluvial-fan deposits, Unit 1
Qof2	Old alluvial-fan deposits, Unit 2
Qof2a	Old alluvial-fan deposits, Unit 2
Qof2b	Old alluvial-fan deposits, Unit 2
Qof2s	Old alluvial-fan deposits, Unit 2
Qof3	Old alluvial-fan deposits, Unit 3
Qof3s	Old alluvial-fan deposits, Unit 3
Qofa	Old alluvial-fan deposits
Qofag	Old alluvial-fan deposits
Qofb	Old alluvial-fan deposits
Qofc	Old alluvial-fan deposits
Qofg	Old alluvial-fan deposits
Qofga	Old alluvial-fan deposits
Qofgb	Old alluvial-fan deposits
Qofs	Old alluvial-fan deposits
Qolb	Old lacustrine deposits (bar)
Qols	Old landslide deposits
Qos	Old surficial deposits
Qp	Very young playa deposits
Qp1	Very young playa deposits, Unit 1
Qs	Very young surficial deposits
Qs1	Very young surficial deposits, Unit 1
Qsg	Very young surficial deposits
Qsh	Shoemaker Gravel
Qsw	Very young slope-wash deposits
Qt	Very young talus deposits
Qvoa	Very old alluvial-valley deposits
Qvoa1	Very old alluvial-valley deposits, Unit 1
Qvoa2	Very old alluvial-valley deposits, Unit 2
Qvoa3	Very old alluvial-valley deposits, Unit 3
Qvoab	Very old alluvial-valley deposits
Qvof	Very old alluvial-fan deposits
Qvof1	Very old alluvial-fan deposits, Unit 1
Qvof1ag	Very old alluvial-valley deposits, Unit 1
Qvof1b	Very old alluvial-fan deposits, Unit 1
Qvof1g	Very old alluvial-fan deposits, Unit 1
Qvof2	Very old alluvial-fan deposits, Unit 2
Qvof2b	Very old alluvial-fan deposits, Unit 2
Qvof2g	Very old alluvial-fan deposits, Unit 2
Qvof3	Very old alluvial-fan deposits, Unit 3
Qvofag	Very old alluvial-fan deposits
Qvofb	Very old alluvial-fan deposits
Qvofg	Very old alluvial-fan deposits
Qvols	Very old landslide deposits
Qvolsa	Very old landslide deposits
Qvor	Very old regolith and (or) pedogenic soil
Qvos	Very old surficial deposits
Qvosw	Very old slope-wash deposits
Qw	Very young wash deposits
Qw1	Very young wash deposits, Unit 1
Qw1a	Very young wash deposits, Unit 1
Qw1g	Very young wash deposits, Unit 1
Qw2	Very young wash deposits, Unit 2
Qw3	Very young wash deposits, Unit 3
Qwag	Very young wash deposits
Qwb	Very young wash deposits
Qwg	Very young wash deposits
Qya	Young alluvial-valley deposits
Qya1	Young alluvial-valley deposits, Unit 1
Qya2	Young alluvial-valley deposits, Unit 2
Qya3	Young alluvial-valley deposits, Unit 3
Qya4	Young alluvial-valley deposits, Unit 4
Qya5	Young alluvial-valley deposits, Unit 5
Qyaa	Young alluvial-valley deposits
Qyc	Young colluvial deposits
Qye	Young eolian deposits
Qyed1	Young eolian deposits (dune sand), Unit 1
Qyes1	Young eolian deposits (sheet-sand), Unit 1
Qyf	Young alluvial-fan deposits
Qyf1	Young alluvial-fan deposits, Unit 1
Qyf1b	Young alluvial-fan deposits, Unit 1
Qyf2	Young alluvial-fan deposits, Unit 2
Qyf2a	Young alluvial-fan deposits, Unit 2
Qyf2b	Young alluvial-fan deposits, Unit 2
Qyf3	Young alluvial-fan deposits, Unit 3
Qyf3a	Young alluvial-fan deposits, Unit 3
Qyf3ag	Young alluvial-fan deposits, Unit 3
Qyf3b	Young alluvial-fan deposits, Unit 3
Qyf3c	Young alluvial-fan deposits, Unit 3
Qyf3cs	Young alluvial-fan deposits, Unit 3
Qyf3ga	Young alluvial-fan deposits, Unit 3
Qyf3s	Young alluvial-fan deposits, Unit 3
Qyf3sc	Young alluvial-fan deposits, Unit 3
Qyf3sg	Young alluvial-fan deposits, Unit 3
Qyf4	Young alluvial-fan deposits, Unit 4
Qyf4b	Young alluvial-fan deposits, Unit 4
Qyf4g	Young alluvial-fan deposits, Unit 4
Qyf5	Young alluvial-fan deposits, Unit 5
Qyf5b	Young alluvial-fan deposits, Unit 5
Qyf5ga	Young alluvial-fan deposits, Unit 5
Qyfa	Young alluvial-fan deposits
Qyfag	Young alluvial-fan deposits
Qyfb	Young alluvial-fan deposits
Qyfc	Young alluvial-fan deposits
Qyfg	Young alluvial-fan deposits
Qyfgb	Young alluvial-fan deposits
Qyfs	Young alluvial-fan deposits
Qyls	Young landslide deposits
Qyp	Young playa deposits
Qys	Young surficial deposits
Qysw	Young slope-wash deposits
Qyt	Young talus deposits
Qyw	Young wash deposits
Qyw1	Young wash deposits, Unit 1
Qyw2	Young wash deposits, Unit 2
Qyw3	Young wash deposits, Unit 3
Qywb	Young wash deposits
TKmg	Mafic granodiorite
TMztp	Pelona Schist and granodiorite of Telegraph Peak
Ta	Andesite dike rocks
Tad	Andesite dikes
Tav	Anaverde Formation, undifferentiated
Tavb	Anaverde Formation, pale-tan arkose unit
Tavc	Anaverde Formation, clay-shale unit
Tavr	Anaverde Formation, red arkose unit
Tavw	Anaverde Formation, white arkose unit
Taz	Sedimentary rocks of Azusa area
Tazc	Sedimentary rocks of Azusa area, conglomerate
Tb	Basalt dikes
Tcc	Conglomerate of Crestline
Tcd	Conglomerate and sandstone, San Sevaine Canyon area
Tcf	Conglomerate of Fredalba
Tcr	Crowder Formation
Tcr1	Crowder Formation, Unit 1
Tcr2	Crowder Formation, Unit 2
Tcr3	Crowder Formation, Unit 3
Tcr4	Crowder Formation, Unit 4
Tcr5	Crowder Formation, Unit 5
Tcu	Conglomerate and arkose, undifferentiated
Tcv1	Cajon Valley Formation, Unit 1
Tcv2	Cajon Valley Formation, Unit 2
Tcv3	Cajon Valley Formation, Unit 3
Tcv4	Cajon Valley Formation, Unit 4
Tcv5	Cajon Valley Formation, Unit 5
Tcv5a	Cajon Valley Formation, Unit 5a
Tcv6	Cajon Valley Formation, Unit 6
Td	Dacite dikes
Tdc	Duarte conglomerate of Shelton (1946)
Tdg	Olivine diabase and gabbro
Tfl	Fernando Formation, lower member
Tflc	Fernando Formation, lower member, comglomerate
Tfu	Fernando Formation, upper member
Tfuc	Fernando Formation, upper member, conglomerate
Tg	Glendora Volcanics, undifferentiated
Tga	Glendora Volcanics, andesite flows
Tgb	Glendora Volcanics, basalt flows
Tgbt	Glendora Volcanics, palagonitic tuff and pillow lava
Tgc	Glendora Volcanics, volcanic conglomerate
Tgf	Glendora Volcanics, fine-grained andesite
Tgh	Hypabyssal granitic rocks
Tgi	Glendora Volcanics, andesite dikes
Tgj	Glendora Volcanics, tuff breccia of Johnson Peak area
Tgr	Glendora Volcanics, rhyolite and dacite flows
Tgrb	Glendora Volcanics, rhyolite and dacite breccia
Tgry	Granodiorite, Yucaipa area
Tma	Mill Creek Formation of Gibson (1971), arkose unit
Tmcp	Mill Creek Formation of Gibson (1971), Pelona Schist-bearing conglomerate unit
Tmcv	Mill Creek Formation of Gibson (1971), volcanic-clast-bearing unit
Tmd	Mountain Meadows Dacite
Tmm	Mill Creek Formation of Gibson (1971), mudstone unit
Tms	Mill Creek Formation of Gibson (1971), sandstone unit
Tp	Puente Formation, undifferentiated
Tpbb	Punchbowl Formation, breccia unit
Tpbd	Punchbowl Formation, diorite-clast unit
Tpbv	Punchbowl Formation, volcanic clast unit
Tpls	Soquel and La Vida Members, undifferentiated
Tplv	Puente Formation, La Vida Member
Tpp1	Phelan Peak deposits of Weldon (1984), Unit 1
Tpp2	Phelan Peak deposits of Weldon (1984), Unit 2
Tpsc	Puente Formation, Sycamore Canyon Member
Tpscc	Puente Formation, Sycamore Canyon Member, conglomerate
Tpsq	Puente Formation, Soquel Member
Tpsqc	Puente Formation, Soquel Member, conglomerate
Tpy	Puente Formation, Yorba Member
Tr	Rhyolite porphyry dikes
Tra	Alaskite of Sunset Cove
Trcp	Monzonite of Cedarpines Park
Trdg	Diorite and gabbro of Bare Mountain
Trf	Monzonite of Fawnskin
Trfl	Leucocratic monzonite of Fawnskin
Trfp	Monzonite of Fifteenmile Point
Trh	Monzonite of Hill 4001
Trlb	Mount Lowe Intrusive Suite, equigranular leucocratic biotite quartz monzonite
Trlh	Mount Lowe Intrusive Suite, hornblende-biotite quartz monzonite
Trll	Mount Lowe Intrusive Suite, porphyritic biotite quartz monzonite
Trlm	Fine-grained leucocratic monzonite
Trlq	Mount Lowe Intrusive Suite, porphyritic quartz monzonite and quartz monzodiorite
Trlu	Mount Lowe Intrusive Suite, undifferentiated
Trm	Monzogranite of Manzanita Springs
Trrl	Monzonite of Rabbit Lake
Trsp	Quartz monzonite of Strawberry Peak
Ts	Mixed marine and nonmarine sedimentary rocks
Tsa	Santa Ana Sandstone
Tsf	San Francisquito Formation
Tsfb	San Francisquito Formation, basal boulder conglomerate unit
Tsfc	San Francisquito Formation, conglomerate unit
Tsfl	San Francisquito Formation, limestone lenses
Tsfs	San Francisquito Formation, shale unit
Tsg	Conglomerate, sandstone, and arkose
Tstl	San Timoteo beds of Frick (1921), lower member
Ttd	Hypabyssal dikes
Ttp	Granodiorite of Telegraph Peak
Tv	Vaqueros Formation
Tvc	Volcaniclastic conglomerate
Tvt	Vasquez Formation, tuffaceous rocks
Tvv	Vasquez Formation
Tw	Formation of Warm Springs Canyon
cgm	Chloritized cataclastic granitic rock
cru	Crystalline rocks, undifferentiated
dgm	Diorite gneiss and migmatite
gb	Gabbro
gg	Gneissic granitoid rocks and gneiss
gn	Mixed metamorphic rocks of Ord Mountains area, gneiss
gnb	Gneiss of Blue Cut area
gnm	Cataclastic gneiss
gr	Granitic rocks, undifferentiated
mm	Mixed metamorphic rocks of Ord Mountains area, marble dominant
mmc	Mixed metamorphic rocks of Ord Mountains area, marble and calcsilicate rock
mms	Mixed metamorphic rocks of Ord Mountains area, marble and schist dominant
mq	Mixed metamorphic rocks of Ord Mountains area, quartzite dominant
ms	Mixed metamorphic rocks of Ord Mountains area, schist dominant
mx	Mixed metamorphic rocks of Ord Mountains area, mixed
water body	water body

UNITNAME

Rock-unit name

SUBUNIT

Subdivisions of units with more than one component

GRAIN_SIZE

Characterizes grain-size of mapped Quaternary units where applicable.

ASSEMBLAGE

Identifies within which of the principle structural blocks a unit is located.

sanbern.aat

Geologic contacts, faults, and map boundary.

L-SYMB

Integer symbol (listed below along with line descriptions) that relates arc to cartographic line symbol in lineset: geoscamp2.lin

L-NAME

Formal name of fault feature

DESCR

Summary description of line type

Value	Definition
3	Contact, scratch, poorly located or gradational over hundreds of meters
0	Pegmatite and granitic dikes
0	Sand dune crests identified from aerial photographs; accurately located
0	intra-unit grain-size boundary
1	Contact; accurately located
1	Crown scarps formed by landsliding; accurately located
1	Dike rocks
1	cartographic, map boundary
4	Scarps produced by sequential stream downcutting; accurately located
5	water body: Lake Arrowhead
5	water body: Silverwood Lake
5	water body
11	Crown scarp, landslide
50	Fault, normal slip; accurately located
50	Fault, reverse slip; accurately located
50	Fault-line scarp, reverse slip on eroded fault; approximately located
50	Fault-line scarp, slip unspecified on eroded fault; accurately located
50	High-angle fault, left oblique slip; accurately located
50	High-angle fault, scarp, normal slip; accurately located
50	High-angle fault, scarp, oblique slip; accurately located
50	High-angle fault, scarp, reverse slip; accurately located
50	High-angle fault, scarp, slip unspecified; accurately located
50	High-angle fault, slip unspecified; accurately located
50	Left-lateral strike-slip fault; accurately located
50	Right-lateral strike-slip fault, scarp; accurately located
50	Right-lateral strike-slip fault; accurately located
50	Right-lateral strike-slip fault; concealed beneath mapped covering unit
50	Thrust fault, older over younger; accurately located
50	Thrust fault, older over younger; concealed beneath mapped covering unit
52	52
52	Fault, reverse slip; approximately located
52	High-angle fault, right oblique slip; approximately located
52	High-angle fault, scarp, slip unspecified; approximately located
52	High-angle fault, slip unspecified; approximately located
52	Left-lateral strike-slip fault; approximately located
52	Right-lateral strike-slip fault; approximately located
53	Fault, reverse slip; concealed beneath mapped covering unit
53	Fault, inferred by indirect methods; concealed beneath mapped covering unit
53	Fault, normal slip; concealed beneath mapped covering unit
53	Fault, reverse slip, concealed beneath mapped covering unit
53	Fault, reverse slip; concealed beneath mapped covering unit
53	High-angle fault, left oblique slip; concealed beneath mapped covering unit
53	High-angle fault, right oblique slip; concealed beneath mapped covering unit
53	High-angle fault, slip unspecified; concealed beneath mapped covering unit
53	Left-lateral strike-slip fault; concealed beneath mapped covering unit
53	Right-lateral strike-slip fault; concealed beneath mapped covering unit
53	Thrust fault, older over younger; concealed beneath mapped covering unit
113	Thrust fault, older over younger; accurately located
113	Thrust fault, scarp, older over younger; accurately located
115	Thrust fault, older over younger; approximately located
116	Thrust fault, older over younger; concealed beneath mapped covering unit
128	Fault, variable angle, rotational slip; accurately located
131	Fault, variable angle, rotational slip; concealed beneath mapped covering unit
137	Fault, intruded; preintrusive existence inferred
211	Topographic lineament formed by aligned saddles, swales and breaks in slope; accurately located

sanbern_str.pat

Planar structural point data showing bedding and foliation orientation (strike, dip, direction of dip);qualitative point data - fold axes line ornamentation.

sanbern_str.aat

Arc attribute table containing fold axes - monocline.

sanbern_dk.aat

Dikes

sanbern_flt.aat

Faults: contains same information as sanbern_geo.aat. However, due to the complexity of regional fault distribution, we feel it is useful to include the faults in a separate coverage. Coverage contains (1) faults, (2) cartographic elements as (a) fault name annotation, (b) fault-plane dip values; (3) line ornamentation as point symbols.

snbrn_carto

Cartographic elements: geologic unit labels (anno.geo), leaders, locality information (anno.locality), names of major water bodies (anno.water_body).

Who produced the data set?

Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
- Douglas M. Morton (compiler)
- Fred K. Miller (compiler)
Who also contributed to the data set?
Technical review by Paul Stone led to significant improvements that eventually were reflected in aspects of the database, the plot file, and in the discussion of the regional geologic framework and the description of the geologic units of the San Bernardino 30' X 60' quadrangle.
Geologic mapping and digital preparation of this report were sponsored jointly by (1) the National Cooperative Geologic Mapping Program of the U.S. Geological Survey, and (2) the Southern California Areal Mapping Project (SCAMP).
To whom should users address questions about the data?

Douglas M. Morton

U.S. Geological Survey, Western Region, Earth Surface Processes Team

Project geologist

U.S. Geological Survey

Department of Earth Sciences

University of California, Riverside
Riverside, California

United States of America

(909) 276-6397 (voice)

(909) 276-6295 (FAX)

scamp@usgs.gov

Why was the data set created?

The data set for the San Bernardino 30'x60' quadrangle has been prepared by the Southern California Areal Mapping Project (SCAMP), a cooperative project sponsored jointly by the U.S. Geological Survey and the California Geological Survey. The San Bernardino data set represents part of an ongoing effort to create a regional GIS geologic database for southern California. This regional digital database, in turn, is being developed as a contribution to the National Geologic Map Database of the National Cooperative Geologic Mapping Program of the USGS. The San Bernardino quadrangle database has been prepared in cooperation with the National Forest Service, as part of an ongoing project to provide the San Bernardino National Forest with a geologic map base for use in managing National Forest resources and in developing interpretive materials.

How was the data set created?

From what previous works were the data drawn?

Barrows, 1980 (source 1 of 22)

Barrows, A.G., 1980, Geologic map of the San Andreas Fault Zone, Juniper Hills and vicinity, Los Angeles County, California: California Division of Mines and Geology (CDMG) Open-File Reports CDMG OF80-2 L.A..

Type_of_Source_Media: paper
Source_Scale_Denominator: 9600
Source_Contribution:
Contributed new geologic and structural data for, and adjacent to, the San Andreas Fault in the Juniper Hills 7.5' quadrangle, part of San Bernardino quadrangle. Minor to moderate simplifications throughout map area, mainly deletion of very small (at 1:9,600 scale) polygons of bedrock in areas of extensive Quaternary deposits. Also, minor to moderate alterations of fault traces, mainly San Andreas and Nadeau Faults.

Barrows, 1985 (source 2 of 22)

Barrows, A.G., 1985, Geologic map of the San Andreas Fault Zone, Los Angeles County, California: California Division of Mines and Geology (CDMG) Open-File Reports CDMG OF85-10 L.A..

Type_of_Source_Media: paper
Source_Scale_Denominator: 12000
Source_Contribution:
Contributed new geologic and structural data for, and adjacent to, the San Andreas Fault in the Valyermo 7.5' quadrangle, part of San Bernardino quadrangle. Minor to moderate simplifications throughout map area, mainly deletion of very small (at 1:12,000 scale) polygons of bedrock in areas of extensive Quaternary deposits. Also, minor to moderate alterations of fault traces, mainly San Andreas Fault. Only sheet H incorporated in compilation.

Cox and others, 1983 (source 3 of 22)

Cox, B.F., Powell, R.E., and Hinkle, M.E., 1983, Mineral resource potential map of the Pleasant View Roadless Area, Los Angeles County, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-1649-A.

Type_of_Source_Media: paper
Source_Scale_Denominator: 62500
Source_Contribution:
Contributed new geologic and structural data for San Bernardino quadrangle in parts of Juniper Hills and Waterman Mtn 7.5' quadrangles. Minor simplifications and alterations to lines and polygons. Several unit names changed to conform to the most current usage and to names used in surrounding areas of San Bernardino 30' X 60' quadrangle.

Crowder, 1967 (source 4 of 22)

Crowder, D.F., 1967, Mineral Resources of the Devil Canyon-Bear Canyon Primitive Area, California: U.S. Geological Survey Bulletin 1230-G.

Type_of_Source_Media: paper
Source_Scale_Denominator: 62,500
Source_Contribution:
Contributed reconnaissance geologic data for San Bernardino quadrangle in parts of Waterman Mtn and Crystal Lake 7.5' quadrangles. Minor alterations and additions to lines and polygons. Several unit names changed to conform to the most current usage and to names used in surrounding areas of San Bernardino 30' X 60' quadrangle.

Foster, 1980 (source 5 of 22)

Foster, J.H., 1980, Late Cenozoic evolution of Cajon Valley, southern California: University of California.

Other_Citation_Details: unpublished Ph.D. thesis

Type_of_Source_Media: paper
Source_Contribution:
Contributed new geologic and structural data for Tertiary units for San Bernardino quadrangle in parts of Cajon 7.5' quadrangle. Minor alterations to conform to modern mapping in surrounding areas of San Bernardino 30' X 60' quadrangle.

Jacobs, 1982 (source 6 of 22)

Jacobs, S.E., 1982, Geology of a part of the upper Santa Ana River Valley, San Bernardino Mountains, San Bernardino, California: University of California.

Other_Citation_Details: unpublished M.S. thesis

Type_of_Source_Media: paper
Source_Scale_Denominator: 20000
Source_Contribution:
Contributed new geologic and structural data for Tertiary units for San Bernardino quadrangle in Santa Ana Canyon area in Keller Peak 7.5' quadrangle. Minor to moderate alterations of lines and polygons throughout map area, and additions from reconnaissance mapping by Miller and Morton in 2000 and 2001.

Kenney, 1999 (source 7 of 22)

Kenney, M.D., 1999, Emplacement, offset history, and recent uplift of basement within the San Andreas Fault System, northeast San Gabriel Mountains, California: University of Oregon.

Other_Citation_Details: unpublished Ph.D. thesis

Type_of_Source_Media: paper
Source_Scale_Denominator: 16000
Source_Contribution:
Contributed new geologic and structural data for San Bernardino quadrangle in Mescal Creek 7.5' quadrangle. Minor to moderate alterations throughout map area, mainly Quaternary deposits. Also, minor to moderate alterations of fault traces, mainly San Andreas. Several unit names changed to conform to the most current usage and to names used in surrounding areas of San Bernardino 30' X 60' quadrangle.

Meisling, 1984 (source 8 of 22)

Meisling, K.E., 1984, Neotectonics of the north frontal fault system of the San Bernardino Mountains, southern California: California Institute of Technology.

Other_Citation_Details: unpublished Ph.D. thesis

Type_of_Source_Media: paper
Source_Scale_Denominator: 24000
Source_Contribution:
Contributed new geologic and structural data for San Bernardino quadrangle in parts of Silverwood Lake, Lake Arrowhead, and Apple Valley South 7.5' quadrangles. Minor alterations and additions to lines and polygons. Several unit names changed to conform to the most current usage and to names used in surrounding areas of San Bernardino 30' X 60' quadrangle.

Miller and Matti, 2001a (source 9 of 22)

Miller, F.K., and Matti, J.C., 2001, Digital geologic map of the Fifteenmile Valley 7.5' quadrangle, San Bernardino County, California: U.S. Geological Survey Open-File Report 01-132.

Type_of_Source_Media: digital data
Source_Scale_Denominator: 24000
Source_Contribution:
Contributed new geologic and structural data for San Bernardino quadrangle in Fifteenmile Valley 7.5' quadrangle. Compiled with essentially no changes.

Miller and Matti, 2001b (source 10 of 22)

Miller, F.K., and Matti, J.C., 2001, Digital geologic map of the San Bernardino North 7.5' quadrangle, San Bernardino County, California: U.S. Geological Survey Open-File Report 01-131.

Type_of_Source_Media: digital data
Source_Scale_Denominator: 24000
Source_Contribution:
Contributed new geologic and structural data for San Bernardino quadrangle in San Bernardino North 7.5' quadrangle. Minor alterations and additions to lines and polygons. Quaternary mapping extensively up-dated by Matti, 2000.

Miller and others, 2000 (source 11 of 22)

Miller, F.K., Matti, J.C., and Brown, H.J., 2000, Digital geologic map of the Butler Peak 7.5' quadrangle, San Bernardino County, California: U.S. Geological Survey Open-File Report 00-145.

Type_of_Source_Media: digital data
Source_Scale_Denominator: 24000
Source_Contribution:
Contributed new geologic and structural data for San Bernardino quadrangle in Butler Peak 7.5' quadrangle. Compiled with essentially no changes.

Morton, 1973 (source 12 of 22)

Morton, D.M., 1973, Geology of parts of the Azusa and Mount Wilson quadrangles, San Gabriel Mountains, Los Angeles County, California: California Division of Mines and Geology (CDMG) Special Report 105.

Type_of_Source_Media: paper
Source_Contribution:
Contributed new geologic and structural data for San Bernardino quadrangle in Azusa 7.5' quadrangle. Minor to moderate simplifications throughout map area, mainly deletion of very small (at 1:12,000 scale) polygons of bedrock. Quaternary mapping extensively up-dated.

Morton, 1978a (source 13 of 22)

Morton, D.M., 1978, Geologic map of the San Bernardino South 7.5' quadrangle, San Bernardino and Riverside Counties, California: U.S. Geological Survey Open-File Report 78-20.

Type_of_Source_Media: paper
Source_Scale_Denominator: 24000
Source_Contribution:
Contributed new geologic and structural data for San Bernardino quadrangle in San Bernardino South 7.5' quadrangle. Compiled with essentially no changes to bedrock geology. Quaternary mapping extensively up-dated.

Morton, 1978b (source 14 of 22)

Morton, D.M., 1978, Geologic map of the Fontana 7.5' quadrangle, San Bernardino and Riverside Counties, California: U.S. Geological Survey Open-File Report 78-19.

Type_of_Source_Media: paper
Source_Scale_Denominator: 24000
Source_Contribution:
Contributed new geologic and structural data for San Bernardino quadrangle in Fontana 7.5' quadrangle. Compiled with essentially no changes to bedrock geology. Quaternary mapping extensively up-dated.

Morton and Matti, 2001a (source 15 of 22)

Morton, D.M., and Matti, J.C., 2001, Digital geologic map of the Cucamonga Peak 7.5' quadrangle, San Bernardino County, California: U.S. Geological Survey Open-File Report 01-311.

Type_of_Source_Media: digital data
Source_Scale_Denominator: 24000
Source_Contribution:
Contributed new geologic and structural data for San Bernardino quadrangle in Cucamonga Peak 7.5' quadrangle. Compiled with essentially no changes to bedrock geology. Quaternary mapping extensively up-dated.

Morton and Matti, 2001b (source 16 of 22)

Morton, D.M., and Matti, J.C., 2001, Digital geologic map of the Devore 7.5' quadrangle, San Bernardino County, California: U.S. Geological Survey Open-File Report 01-173.

Type_of_Source_Media: digital data
Source_Scale_Denominator: 24000
Source_Contribution:
Contributed new geologic and structural data for San Bernardino quadrangle in Devore 7.5' quadrangle. Compiled with essentially no changes to bedrock geology. Quaternary mapping moderately up-dated.

Morton and others, 2001 (source 17 of 22)

Morton, D.M., and Woodbourne, M.O., 2001, Digital geologic map of the Telegraph Peak 7.5' quadrangle, San Bernardino County, California: U.S. Geological Survey Open-File Report 01-293.

Type_of_Source_Media: digital data
Source_Scale_Denominator: 24000
Source_Contribution:
Contributed new geologic and structural data for San Bernardino quadrangle in Telegraph Peak 7.5' quadrangle. Compiled with essentially no changes.

Tan, 1998a (source 18 of 22)

Tan, Siang S., 1998, Digital geologic map of the Baldwin Park 7.5' quadrangle, Los Angeles County, California: California Geological Survey Open-File Reports 98-30.

Type_of_Source_Media: paper
Source_Scale_Denominator: 24000
Source_Contribution:
Contributed new geologic and structural data for San Bernardino quadrangle in Baldwin Park 7.5' quadrangle. Compiled with very minor changes to lines and polygons. Quaternary mapping moderately up-dated.

Tan, 1998b (source 19 of 22)

Tan, Siang S., 1998, Contributed new geologic and structural data for San Bernardino quadrangle in San Dimas 7.5' quadrangle. Digital geologic map of the San Dimas 7.5' quadrangle, Los Angeles County, California: California Geological Survey Open-File Reports 98-31.

Type_of_Source_Media: paper
Source_Scale_Denominator: 24000
Source_Contribution:
Compiled with very minor changes to lines and polygons. Quaternary mapping moderately up-dated.

Shelton, 1955 (source 20 of 22)

Shelton, J.S., 1955, Glendora volcanic rocks, Los Angeles Basin, California: Geological Society of America Bulletin v. 66, n. 1, p. 45-89.

Type_of_Source_Media: paper
Source_Scale_Denominator: 24000
Source_Contribution:
Contributed new geologic and structural data on Glendora Volcanics for San Bernardino quadrangle in Glendora 7.5' quadrangle. Compiled with moderate changes to lines and polygons. Quaternary mapping extensively up-dated.

Wheldon, 1986 (source 21 of 22)

Weldon, R.J., 1986, The late Cenozoic geology of Cajon Pass; implications for tectonics and sedimentation along the San Andreas Fault: California Institute of Technology.

Other_Citation_Details: unpublished Ph.D. thesis

Type_of_Source_Media: paper
Source_Scale_Denominator: 24000
Source_Contribution:
Contributed new geologic and structural data for San Bernardino quadrangle in parts of Silverwood Lake, Lake Arrowhead, and Apple Valley South 7.5' quadrangles. Minor alterations and additions to lines and polygons. Several unit names changed to conform to the most current usage and to names used in surrounding areas of San Bernardino 30' X 60' quadrangle.

Woodbourne and Golz, 1972 (source 22 of 22)

Woodbourne, M.O., and Golz, D.J., 1972, Stratigraphy of the Punchbowl Formation, Cajon Valley, southern California: Berkeley, University of California Publications in Geological Sciences v. 92, 73 p.

Type_of_Source_Media: paper
Source_Contribution:
Contributed new geologic and structural data on Tertiary units for San Bernardino quadrangle in Cajon 7.5' quadrangle. Minor alterations and additions to lines and polygons. Several unit names changed to conform to the most current usage and to names used in surrounding areas of San Bernardino 30' X 60' quadrangle.
How were the data generated, processed, and modified?
Date: 31-Dec-2002 (process 1 of 3)
The San Bernardino 30'x60' quadrangle was compiled from both published and unpublished data. Compilation and integration of published sources were accomplished by initial inspection of the data, comparison to aerial photography of the area, and updating of those data either directly onscreen or by digitizing the updated data from base-stable media on which the updated data had been drawn.
In the course of the compilation, due to the varied detail of data sources, some units from these sources were combined to form composite units, and in some cases unit names were changed to conform to the most current usage or more recent geologic mapping. These changes and combining of units are noted and discussed in the Description of Map Units.
Geographic Information System (GIS) ArcInfo software developed by Environmental Systems Research Institute, Inc., (ESRI) v.8.1 on a SunOS, 5.8, sun4du UNIX system were used to process the work.
Person who carried out this activity:

Fred K. Miller

US Geological Survey

Project geologist

.S. Geological Survey, Rm. 202, 904 West Riverside Avenue
Spokane, Washington

USA

509-368-3121 (voice)

509-368-3199 (FAX)

fmiller@usgs.gov

Data sources used in this process:
- Barrows, 1980
- Barrows, 1985
- Cox and others, 1983
- Crowder, 1967
- Foster, 1980
- Jacobs, 1980
- Kenney, 1999
- Meisling, 1984
- Miller and Matti, 2001a
- Miller and Matti, 2001b
- Miller and others, 2000
- Morton, 1973
- Morton, 1978a
- Morton,1978b
- Morton and Matti, 2001a
- Morton and Matti, 2001b
- Morton and others, 2001
- Tan, 1998a
- Tan, 1998b
- Shelton, 1955
- Weldon, 1986
- Woodbourne and Golz, 1972
Date: 2001 (process 2 of 3)
The process of compiling the San Bernardino 30'x60' quadrangle required that a large amount of unpublished mapping from many authors be processed and included in the final digital map geologic database. The authors and sources of the unpublished mapping are listed according to each constituent 7.5' quadrangle:
Ontario
Morton, D.M. and Matti, J.C., Mapping and aerial photograph interpretation done 1990-1999. U.S. Geological Survey, scale, 1:24,000 (aerial photography and paper)
Guasti
Morton, D.M. and Matti, J.C., Mapping and aerial photography interpretation done 1990-1999. U.S. Geological Survey, scale, 1:24,000 (aerial photography and paper)
Fontana
Morton, D.M., Mapping and aerial photograph interpretation done 1990-1999. U.S. Geological Survey, scale, 1:24,000 (aerial photography and paper)
San Bernardino South
Morton, D.M. and Matti, J.C., Mapping and aerial photograph interpretation done 1990-1999. U.S. Geological Survey, scale, 1:24,000 (aerial photography and paper)
Redlands
Matti, J.C. and Morton, D.M., Mapping done 1978-1998. U.S. Geological Survey, scale, 1:24,000 (paper)
Yucaipa
Matti, J.C. and Morton, D.M., Mapping done 1978-1998. U.S. Geological Survey, scale, 1:24,000 (paper)
Azusa
Morton, D.M., U.S. Geological Survey, mapping done 1990-1997, scale, 1: 24,000 (paper); Nourse, J.A., California State Polytechnic University, Pomona, mapping done 1997-2001, scale, 1:24,000 (base stable)
Glendora
Morton, D.M., U.S. Geological Survey, mapping done 1990-1997, scale, 1: 24,000 (paper); Nourse, J.A., California State Polytechnic University, Pomona, mapping done 1997-2001, scale, 1:24,000 (base stable)
Glendora
Bezore, S.P., California Geological Survey, mapping done 1997-1999, scale, 1:24,000. Compiled area also includes published mapping by Shelton, J.S. 1955 (paper)
Mount Baldy
Morton, D.M., U.S. Geological Survey, mapping done 1988-1999, scale, 1: 24,000 (paper); Nourse, J.A., California State Polytechnic University, Pomona, mapping done 1997-2001, scale, 1:24,000 (base stable); Ehlig, P.L., mapping done 1955-1985, scale, 1:24,000 (paper)
Morton, D.M., Matti, J.C., U.S. Geological Survey, mapping done 1988-1999, scale, 1:24,000 (paper)
San Bernardino North
Matti, J.C., Quaternary mapping done 2000. U.S. Geological Survey, scale, 1: 24,000. (not included in published map) (paper, aerial photography, and base stable)
Harrison Mtn
Miller, F.K., Morton, D.M., and Matti, J.C., Mapping done 1988-1999, 2000-2001. U.S. Geological Survey, scale, 1:24,000 (paper and base stable)
Keller Peak
Miller, F.K., Morton, D.M., and Matti, J.C., Mapping done 1988-1999, 2000-2001. U.S. Geological Survey, scale, 1:24,000 (paper and base stable)
Crystal Lake
Ehlig, P.L., mapping done 1955-1985, California State University, Los Angeles, scale 1:24,000 (paper); Nourse, J.A., mapping done 1996-2001, California State Polytechnic University, Pomona, scale, 1:24,000 (base stable); Morton, D.M., U.S. Geological Survey, mapping done 1990-1997, scale, 1:24,000 (paper)
Mount San Antonio
Ehlig, P.L., mapping done 1955-1985, California State University, Los Angeles, scale 1:24,000 (paper); Nourse, J.A., mapping done 1996-2001, California State Polytechnic University, Pomona, scale, 1:24,000 (base stable); Morton, D.M., U.S. Geological Survey, mapping done 1990-1997, scale, 1:24,000 (paper)
Mount San Antonio
Morton, D.M., U.S. Geological Survey, mapping done 1980-1990, scale, 1:24,000 (paper)
Cajon
Morton, D.M., U.S. Geological Survey, mapping done 1980- 1999, scale, 1:24,000 (paper)
Silverwood Lake
Miller, F.K. and Morton, D.M., mapping done 1996-2001, U.S. Geological Survey, scale, 1:24,000 (paper)
Lake Arrowhead
Miller, F.K., reconnaissance mapping done 2000-2001, U.S. Geological Survey, scale, 1:24,000 (aerial photography and paper)
Juniper Hills
Morton, D.M. and Miller, F.K., reconnaissance mapping and aerial photography interpretation done 1999-2001, U.S. Geological Survey, scale, 1:24,000 (aerial photography and paper)
Valyermo
Morton, D.M. and Miller, F.K., reconnaissance mapping and aerial photography interpretation done 1999-2001, U.S. Geological Survey, scale, 1:24,000 (aerial photography and paper)
Mescal Creek
Morton, D.M. and Miller, F.K., reconnaissance mapping and aerial photography interpretation done 1999-2001, U.S. Geological Survey, scale, 1:24,000 (aerial photography and paper)
Phelan
Morton, D.M. and Miller, F.K., reconnaissance mapping and aerial photography interpretation done 1999-2001, U.S. Geological Survey, scale, 1:24,000 (aerial photography and paper)
Baldy Mesa
Morton, D.M. and Miller, F.K., reconnaissance mapping and aerial photography interpretation done 1999-2001, U.S. Geological Survey, scale, 1:24,000 (aerial photography and paper)
Hesperia
Morton, D.M. and Miller, F.K., reconnaissance mapping and aerial photography interpretation done 1999-2001, U.S. Geological Survey, scale, 1:24,000 (aerial photography and paper)
Apple Valley South
Morton, D.M. and Miller, F.K., reconnaissance mapping and aerial photography interpretation done 1999-2001, U.S. Geological Survey, scale, 1:24,000 (aerial photography and paper) Person who carried out this activity:

U.S. Geological Survey

Attn: F.K. Miller

Project geologist

U.S. Geological Survey, Rm. 202, 904 West Riverside Avenue
Spokane, Washington

USA

509-368-3121 (voice)

509-368-3199 (FAX)

fmiller@usgs.gov

Date: 21-May-2009 (process 3 of 3)
Creation of original metadata record Person who carried out this activity:

U.S. Geological Survey

Attn: Pamela M. Cossette

geographer

U.S. Geological Survey, Rm. 202, 904 West Riverside Avenue
Spokane, Washington

USA

509-368-3123 (voice)

509-368-3199 (FAX)

pcossette@usgs.gov
What similar or related data should the user be aware of?
Morton, Douglas M., 1999, Preliminary Digital Geologic Map of the Santa Ana 30' x 60' Quadrangle, Southern California: U.S. Geological Survey Open-File Report 99-172, U.S. Geological Survey, Menlo Park, California.
Online Links:
- http://pubs.usgs.gov/of/1999/of99-172/

How reliable are the data; what problems remain in the data set?

How well have the observations been checked?
Geologic-map units in the San Bernardino quadrangle database were described using standard field methods. Consistent with these methods, the database author has assigned standard geologic attributes to geologic lines, points, and polygons identified in the database.
Nation-wide geologic-map accuracy standards have not been developed and adopted by the U.S. Geological Survey and other earth-science entities. Until such standards are adopted, the SCAMP project has developed internal map-accuracy standards for 1:100,000-scale geologic maps produced by the project.
Geologic lines and points on 1:100,000 scale geologic maps are judged to meet SCAMP's internal map-accuracy standards if they are located to within +/-50 meters, relative to topographic or cultural features on the base map. On any derivative geologic-map plot, line data for faults that are judged to meet the SCAMP internal map-accuracy standard are denoted by solid lines; line data that may not meet the SCAMP internal map-accuracy standard are denoted by dashed or dotted lines. All non-fault contacts are represented by solid lines, and represent the same accuracy standards as their fault counterparts. The few non-fault dashed lines on the map represent very poorly located or highly gradational contacts, and are not as accurately located as their fault conterparts. There is no cartographic device for conveying the map-accuracy for geologic-point data (eg. symbols representing bedding, foliation, lineations, etc.).
How accurate are the geographic locations?
The maximum transformation RMS error acceptable for 30' x 60' quadrangle transformation and data input from constituent 7.5' quadrangles and unpublished mapping is 0.003 (7.6 meters). Horizontal positional accuracy was checked by visual comparison of hard-copy plots with base-stable source data.
How accurate are the heights or depths?
Where are the gaps in the data? What is missing?
The geologic map and digital database of the San Bernardino 30'x 60' quadrangle contain new data that have been subjected to rigorous review and are a substantially complete representation of the current state of knowledge concerning the geology of the quadrangle. In several areas, map data have been compiled from other sources (see Sheet 5, figure 3). Much but not all of this compiled work was field checked and is considered to represent the current state of knowledge in the respective areas.
How consistent are the relationships among the observations, including topology?
Polygon and chain-node topology present.
The areal extent of the map is represented digitally by an appropriately projected (UTM projection), mathematically generated box. Consequently, polygons intersecting the lines that comprise the map boundary are closed by that boundary. Polygons internal to the map boundary are completely enclosed by line segments which are themselves a set of sequentially numbered coordinate pairs. Point data are represented by coordinate pairs.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: None
Use_Constraints:
The San Bernardino 30' x 60' geologic-map database should be used to evaluate and understand the geologic character of the San Bernardino 30' x 60' quadrangle as a whole. The data should not be used for purposes of site-specific land-use planning or site-specific geologic evaluations. The database is sufficiently detailed to identify and characterize geologic materials and structures. However, it is not sufficiently detailed for most site-specific determinations.
Use of this digital geologic-map database should not violate the spatial resolution of the data. Although the digital form of the data removes the constraint imposed by the scale of a paper map, the detail and accuracy inherent in map scale are also present in the digital data. Use of this digital geologic map should not violate the spatial resolution of the data. The San Bernardino 30' x 60' database was compiled from many sources including: (1) 1:62,500 reconnaisance mapping, (2) mapping from 1:24,000 USGS Open-File releases, (3) unpublished 1:24,000 mapping (4) Quaternary mapping from interpretation of 1:24,000 aerial photography, and (5) detailed 1:9,600 and 1:12,000 mapping from California Geological Survey Open-File releases. See Sheet 5, figure 3 for detailed sources of mapping. Any enlargement beyond the spatial resolution of the original geologic source data violates the spatial resolution of the data. Similarly, the digital topographic base data are derived from the U.S. Geological Survey, 1:100,000-scale San Bernardino 30' x 60' Digital Line Graphs (DLGs); any enlargement beyond this scale may be misleading. Where this database is used in combination with other data of higher resolution, the resolution of the combined output will be limited by the lower resolution data. No part of the database is intended to serve for site-specific studies.
Examination of a plot of the geologic map (Sheet 1) indicates detail in some areas that is far to fine to show well at 1:100,000 scale. This detail is purposely maintained to draw attention to areas where detailed information, compiled from large-scale maps is available. This detail may be viewed by on-screen examination of the digital map coverage or by plotting selected areas at larger scales. However, any enlargement beyond the spatial resolution of the original geologic source data violates the spatial resolution of the data.

Who distributes the data set? (Distributor 1 of 1)

U.S. Geological Survey Information Services

Box 25286 Denver Federal Center
Denver, CO

USA

303-202-4700 (voice)

303-202-4693 (FAX)
What's the catalog number I need to order this data set? USGS Open-File Report 03-293
What legal disclaimers am I supposed to read?
The U.S. Geological Survey (USGS) provides these geographic data "as is." The USGS makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. The USGS further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers at the USGS, no warranty, expressed or implied, is made by the USGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty.
In no event shall the USGS have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by USGS.
This digital, geologic map database of the San Bernardino 30' x 60' quadrangle, 1:100,000 map-scale, and any derivative maps thereof, is not meant to be used or displayed at any scale larger than 1:100,000 (e.g., 1:24,000).
How can I download or order the data?
- Availability in digital form:
  
  Data format: Geologic units, structural features, and base map features in format ARCE (version 8.1) Size: 35
  
  Network links: http://pubs.usgs.gov/of/2003/of03-293/sanbern.tar.gz
- Cost to order the data: none

Data format:	Geologic units, structural features, and base map features in format ARCE (version 8.1) Size: 35
Network links:	http://pubs.usgs.gov/of/2003/of03-293/sanbern.tar.gz

Who wrote the metadata?

Dates:: Last modified: 05-Feb-2016
Last Reviewed: 26-Jul-2004
Metadata author:: Peter N Schweitzer

USGS Midwest Area

Collection manager, USGS Geoscience Data Clearinghouse, http://geo-nsdi.er.usgs.gov/

Mail Stop 954

12201 Sunrise Valley Dr
Reston, VA

USA

703-648-6533 (voice)

703-648-6252 (FAX)

pschweitzer@usgs.gov
Metadata standard:: Content Standard for Digital Geospatial Metadata (version 2.0) (FGDC-STD-001-1998)

This page is <https://geo-nsdi.er.usgs.gov/metadata/open-file/03-293/metadata.faq.html>