Online Links:
COUG_GEO.PAT:
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME
1 AREA 8 18 F 5
9 PERIMETER 8 18 F 5
17 COUG_GEO# 4 5 B -
21 COUG_GEO-ID 4 5 B -
25 LABL 35 35 C -
60 PLABL 35 35 C -
95 TAG 25 25 C -
120 SHDPS 3 3 I -
123 NAME 254 254 C -
377 SHDFIL 3 3 I -
LABL geologic map unit label, in plain text
Jg Granite Jp Porphyritic quartz monzonite, monzogranite, and granodiorite Kcb Monzogranite of Cougar Buttes Kgd Granodiorite Kmi Mafic-rich intermediate rocks Kmp Mixed plutonic rocks Kp Porphyritic monzogranite MzPrgg Granitic orthogneiss Prgn Gneiss QTbrbc Breccia, strata of Blackhawk Canyon QTbrc Breccia, carbonate rocks QTbrg Breccia, granitic rocks QTc Conglomerate of Cushenbury Spring QTs1 Sandstone and conglomerate, member 1 QTs2 Sandstone and conglomerate, member 2 QTspcb Saprolite, monzogranite of Cougar Buttes QTspmp Saprolite, mixed plutonic rocks Qmof Moderately old alluvial fan deposits Qmof? Moderately old alluvial fan deposits? Qmol Moderately old lacustrine deposits Qmol? Moderately old lacustrine deposits? Qmolsbc Moderately old landslide breccia, strata of Blackhawk Canyon Qmolsc Moderately old landslide breccia, carbonate rocks Qmolscc Moderately old landslide breccia, conglomerate of Cushenbury Springs Qmos Moderately old slope wash and alluvial deposits Qoc Old colluvial deposits Qoc? Old colluvial deposits? Qoc1 Old colluvial deposits, unit 1 Qoc2 Old colluvial deposits, unit 2 Qof Old alluvial fan deposits Qof? Old alluvial fan deposits? Qolsbc Old landslide breccia, strata of Blackhawk Canyon Qolsc Old landslide breccia, carbonate-rock Qolsg Old landslide breccia, granitic rocks Qp Active playa deposits Qvodf Very old debris flow fan deposits Qvof1 Very old alluvial fan deposits, unit 1 Qvof2 Very old alluvial fan deposits, unit 2 Qvos Very old slope wash and alluvial deposits Qvos? Very old slope wash and alluvial deposits? Qw Active wash deposits Qya Young axial valley deposits Qyas+Qye Young alluvial and slope wash deposits + Quaternary young eolian deposits Qydf Young debris flow fan deposits Qye Young eolian deposits Qye? Young eolian deposits? Qyf Young alluvial fan deposits Qyf1 Young alluvial fan deposits, unit 1 Qyf2 Young alluvial fan deposits, unit 2 Qyf3 Young alluvial fan deposits, unit 3 Qyf4 Young alluvial fan deposits, unit 4 Qyfe Young alluvial fan and eolian deposits Qyfe? Young alluvial fan and eolian deposits? Qyfs Young alluvial fan sand deposits Qyfw1 Young alluvial fan feeder wash deposits, unit 1 Qyfw2 Young alluvial fan feeder wash deposits, unit 2 Qyfw3 Young alluvial fan feeder wash deposits, unit 3 Qyfw4 Young alluvial fan feeder wash deposits, unit 4 Qyls Young landslide deposits Qyos Young(?) and old slope wash and alluvial deposits Qyoss1 Young(?) and old slope wash and alluvial deposits, substrate 1 Qyoss2 Young(?) and old slope wash and alluvial deposits, substrate 2 Qyoce Young and old colluvial and eolian deposits Qyp Young playa deposits Qyse Young slope wash, alluvial, and eolian deposits Qyse? Young slope wash, alluvial, and eolian deposits? Qysos1 Young slope wash and alluvial deposits, oxidized, substrate 1 Qysos2 Young slope wash and alluvial deposits, oxidized, substrate 2 Qysos2? Young slope wash and alluvial deposits, oxidized, substrate 2? Qysos3 Young slope wash and alluvial deposits, oxidized, substrate 3 Qysos3? Young slope wash and alluvial deposits, oxidized, substrate 3? Qyss Young slope wash and alluvial deposits, sandstone substrate Qysws1 Young slope wash and alluvial deposits, white, substrate 1 Qysws2 Young slope wash and alluvial deposits, white, substrate 2 Qyw Young wash deposits Ta Arkosic sandstone Ta? Arkosic sandstone? Tb Basalt Tl Lacustrine strata Tl? Lacustrine strata?PLABL coded geologic map unit label used to generate plot labels with relevant stratigraphic symbols. The geologic units with LABL MzPrgg (Mesozoic or Proterozoic) and Prgn (Proterozoic) appear as }<gg, <gn respectively in the item PLABL. The replacement characters call their corresponding symbols from the Stratagem Font Group. Geologic map unit labels will plot on derivative map plots with appropriate stratigraphic symbols if PLABL is used as the source of unit labels. The Stratagem Font Group is accessed through geofont.txt, and is included in the data package.
COUG_GEO.AAT:
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME
1 FNODE# 4 5 B -
5 TNODE# 4 5 B -
9 LPOLY# 4 5 B -
13 RPOLY# 4 5 B -
17 LENGTH 8 18 F 5
25 COUG_GEO# 4 5 B -
29 COUG_GEO-ID 4 5 B -
33 L-TAG 25 25 C -
58 L-SYMB 3 3 I -
61 L-NAME 200 200 C -
L-TAG line tag which consists of a character and numerical value, e.g.
C17, allows the user to relate the line entity to its corresponding
definition in lines.rel
C17 Contact, landslide, location meets map accuracy standard C18 Contact, landslide, location may not meet map accuracy standard C2 Contact, generic, location may not meet map accuracy standard C22 Contact, landslide, questionable, location may not meet map accuracy standard C23 Contact, landslide, questionable, covered, location may not meet map accuracy standard C30 Contact, sedimentary, location may not meet map accuracy standard C31 Contact, sedimentary, inferred, location may not meet map accuracy standard C32 Contact, sedimentary, covered, location may not meet map accuracy standard C42 Contact, sedimentary, gradational, location may not meet map accuracy standard C49 Contact, igneous, location meets map accuracy standard C50 Contact, igneous, location may not meet map accuracy standard C65 Contact, metamorphic, location meets map accuracy standard C66 Contact, metamorphic, location may not meet map accuracy standard C81 Contact, regolith, location meets map accuracy standard C82 Contact, regolith, location may not meet map accuracy standard CL1 Cartographic line, map boundary F14 Fault, high angle, strike slip, right lateral, inferred, location may not meet map accuracy standard F16 Fault, high angle, normal slip, location may not meet map accuracy standard F20 Fault, high angle, strike slip, right lateral, covered, location may not meet map accuracy standard F22 Fault, high angle, normal slip, covered, location may not meet map accuracy standard F31 Fault, high angle, slip unspecified, generic, inferred, location may not meet map accuracy standard F38 Fault, high angle, strike slip, right lateral, questionable, location may not meet map accuracy standard F8 Fault, high angle, strike slip, right lateral, location may not meet map accuracy standard F90 Fault, low angle, slip unspecified, older over younger, location may not meet map accuracy standard F98 Fault, low angle, normal slip, younger over older, location may not meet map accuracy standard MH1 Marker horizon, buried paleosol, location meets map accuracy standardL-SYMB calls up the appropriate line symbol from the lineset geoscamp2.lin (included in the data package)
COUG_STR.AAT:
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME
1 FNODE# 4 5 B -
5 TNODE# 4 5 B -
9 LPOLY# 4 5 B -
13 RPOLY# 4 5 B -
17 LENGTH 8 18 F 5
25 COUG_STR# 4 5 B -
29 COUG_STR-ID 4 5 B -
33 L-TAG 25 25 C -
58 L-SYMB 3 3 I -
List of line types used in the Cougar Buttes structural map
coverage (coug _str.aat), including abbreviated descriptions from
lines.rel:
FA33 Fold axial trace, anticline, upright, location meets map accuracy standard FA97 Fold axial trace, syncline, upright, location meets map accuracy standard3) coug_pts - geological point data
COUG_PTS.PAT:
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME
1 AREA 8 18 F 5
9 PERIMETER 8 18 F 5
17 COUG_PTS# 4 5 B -
21 COUG_PTS-ID 4 5 B -
25 P-DIP 3 3 I -
28 P-STRIKE 3 3 I -
31 P-SYMB 3 3 I -
34 P-TAG 25 25 C -
59 P-PLUNGE 3 3 I -
62 P-DIPDIR 3 3 I -
P-DIP the dip of planar features
B2 Bedding attitude, sedimentary, inclined FN42 Foliation attitude, metamorphic, inclined L26 Lineation, metamorphic, minor fold axes, sinistral rotationP-PLUNGE lineation plunge value
COUG_PTSORN.PAT:
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME
1 AREA 8 18 F 5
9 PERIMETER 8 18 F 5
17 COUG_PTSORN# 4 5 B -
21 COUG_PTSORN-ID 4 5 B -
25 P-TAG 25 25 C -
50 P-SYMB 3 3 I -
Point types (fold axes ornamentation) in coug_ptsorn.pat and
their corresponding, abbreviated descriptions from points.rel:
FAC10 Fold ornament, syncline, upright axial plane FAC4 Fold ornament, anticline, upright axial plane5) coug_ldr - annotation leaders
COUG_LDR.AAT:
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME
1 FNODE# 4 5 B -
5 TNODE# 4 5 B -
9 LPOLY# 4 5 B -
13 RPOLY# 4 5 B -
17 LENGTH 8 18 F 5
25 COUG_LDR# 4 5 B -
29 COUG_LDR-ID 4 5 B -
33 L-SYMB 3 3 I -
The data dictionary tables, lines.rel and points.rel each
contain three items: L-TAG and P-TAG establish the links
between the .aat, and the .pat to the respective data
tables. The items L-DEF and P-DEF, respectively provide the
coded definition for an entity. The items L-EXP and P-EXP
provide a parsed explanation of the code contained in the
corresponding -DEF items.
Our representation and interpretation of the surficial geology in the Cougar Buttes quadrangle has benefited from discussions about surficial processes in general and soils in particular with Leslie D. McFadden and Martha C. Eppes. Visits to soil pits dug by Martha C. Eppes and discussion of her findings in and around the Cougar Buttes quadrangle have contributed to our understanding of age and shallow subsurface relations among various units.
Interpretation of the subsurface geology was made possible by access to water-monitoring well records provided by the Water Resources Division of the U.S. Geological Survey and by water-monitoring and water well records provided by the Mojave Water Agency and the California Department of Water Resources. Roland Hall retrieved the available records from the latter two agencies. Our interpretation of subsurface relations was enhanced by discussions with Jill N. Densmore-Judy and Peter Martin.
In our mapping in the Cougar Buttes quadrangle, we were guided in part by the findings of previously published maps: (1) 1:24,000-scale mapping of the Blackhawk landslide by Shreve (1968), (2) 1:24,000-scale mapping of the quadrangle by Sadler (1982), and (3) 1:62,500-scale mapping of the quadrangle by Dibblee (1964).
We thank Fred K. Miller for his notes and observations on plutonic rocks at various localities on Cougar Buttes, and for scribing the geologic map in preparation for scanning.
Technical reviews by Scott C. Lundstrom and John C. Tinsley, III have led to significant improvements in the data base, the plot file, and in the discussion of the geology of the Cougar Buttes quadrangle in the accompanying summary pamphlet.
Geologic mapping, topical studies, and digital preparation of this report were sponsored jointly by (1) the National Cooperative Geologic Mapping Program of the U.S. Geological Survey, (2) the Mojave Water Agency, and (3) the U.S. Forest Service (San Bernardino National Forest). The U.S. Geological Survey's Photogrammetric Plotter Laboratory in Denver, Colorado (James Messerich, photogrammetrist) supported the transfer of geologic linework and point data from aerial photographs to a scale-stable cartographic base. In our digital preparation of the data set, carried out in the Spokane Field Office Geological Information System laboratory of the Mineral Resources Survey Program of the U.S. Geological Survey in Spokane, Washington, we received helpful assistance from Paul C. Hyndman and Rachel Hauser.
Dibblee, T.W., Jr., 1964, Geologic map of the Lucerne Valley quadrangle, San Bernardino County, California: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-426, scale 1:62,500.
Sadler, P.M., 1982, Geologic map of the Cougar Buttes 7.5' quadrangle: California Division of Mines and Geology Open File Report OFR 82-18 S.F., Plate E, scale 1:24,000.
Shreve, R.L., 1968, The Blackhawk landslide: Geological Society of America Special Paper 108, 47 p.
The data set for the Cougar Buttes 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 Division of Mines and Geology, as part of an ongoing effort to utilize a Geographical Information System (GIS) format to create a regional digital geologic database for southern California. This regional database is being developed as a contribution to the National Geologic Map Data Base of the National Cooperative Geologic Mapping Program of the USGS. Development of the data set for the Cougar Buttes quadrangle has also been supported by the Mojave Water Agency and U.S. Forest Service, San Bernardino National Forest.
The digital geologic map database for the Cougar Buttes quadrangle has been created as a general-purpose data set that is applicable to other land-related investigations in the earth and biological sciences. In cooperation with the Water Resources Division of the U.S. Geological Survey, we have used our mapping in the Cougar Buttes and adjoining quadrangles together with well log data to develop a hydrogeologic framework for the basin. In an effort to understand surficial processes and to provide a base suitable for ecosystem assessment, we have differentiated surficial veneers on piedmont and pediment surfaces and distinguished the various substrates found beneath these veneers. Currently, the geologic database for the Cougar Buttes quadrangle is being applied in groundwater investigations in the Lucerne Valley basin (USGS, Water Resources Division), in biological species studies of the Cushenbury Canyon area (U.S. Forest Service, San Bernardino National Forest), and in the study of soils on various Quaternary landscape surfaces on the north piedmont of the San Bernardino Mountains (University of New Mexico). The Cougar Buttes database is not suitable for site-specific geologic evaluations at scales greater than 1:24,000 (1 in = 2,000 ft).
Online Links:
Scale (X,Y) = (609.687,609.887) Skew (degrees) = (0.000)
Rotation (degrees) = (-0.041) Translation = (-6359.613,-768.716)
RMS Error (input,output) = (0.001,0.847)
Affine X = Ax + By + C
Y = Dx + Ey + F
A = 609.687 B = 0.437 C = -6359.613
D = -0.440 E = 609.887 F = -768.716
Are there legal restrictions on access or use of the data?Access_Constraints: None
Use_Constraints:The Cougar Buttes 7.5' geologic-map database should be used to evaluate and understand the geologic character of the Cougar Buttes 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 many actual and potential geologic hazards represented by faults and landslides. However, it is not sufficiently detailed for site-specific determinations or evaluations of those features. Faults shown do not take the place of fault-rupture hazard zones designated by the California State Geologist (see Hart, 1988).
Use of the Cougar Buttes 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 any derivative maps, the detail and accuracy issues inherent in map scale limitations are also present in the digital data. The fact that this database was edited at a scale of 1:24,000 means that higher-resolution data generally are not present in the dataset. Plotting at scales larger than 1:24,000 will not yield greater, real detail, although it may reveal fine-scale irregularities beyond the intended resolution of the database. Similarly, although higher-resolution data is incorporated at a few places, the resolution of the combined output will be limited by the lower-resolution data.
This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Hart, E. W., 1988, Fault-rupture zones in California; Alquist-Priolo Special Studies Zones Act of 1972 with index to special studies zones maps: California Division of Mines and Geology Special Publication 42
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 Cougar Buttes 7.5'quadrangle, 1:24,000 map-scale, and any derivative maps thereof, is not meant to be used or displayed at any scale larger than 1:24,000 (e.g., 1:12,000).
| Data format: | ARCE (version 7.x) Size: 3.8 |
|---|---|
| Network links: |
http://pubs.usgs.gov/of/2000/0175/coug.tar.gz |