Preliminary digital geologic map of the Santa Ana 30' x 60' quadrangle, Southern California, version 1.0

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Frequently anticipated questions:


What does this data set describe?

Title:
Preliminary digital geologic map of the Santa Ana 30' x 60' quadrangle, Southern California, version 1.0
Abstract:
The Santa Ana Quadrangle is in the northern part of the Peninsular Ranges Province as defined by Jahns (1954), except for the northeast corner, which is underlain by basement rocks of the Transverse Ranges Province. A summary of the general geology of the Peninsular Ranges Province is given by Jahns (1954) and a generalized geologic map of this part of the Peninsular Ranges Province is given by Rogers (1965). This report provides a digital representation of this quadrangle.
  1. How might this data set be cited?
    Morton, D.M., Hauser, Rachel M., and Ruppert, Kelly R., 1999, Preliminary digital geologic map of the Santa Ana 30' x 60' quadrangle, Southern California, version 1.0: U.S. Geological Survey Open-File Report 99-0172.

    Online Links:

    Other_Citation_Details: ARC/INFO export format (18MB). Plotfiles available also.
  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -118.0
    East_Bounding_Coordinate: -117.0
    North_Bounding_Coordinate: 34.0
    South_Bounding_Coordinate: 33.50
  3. What does it look like?
    http://pubs.usgs.gov/of/1999/of99-172/sanana2.pdf (PDF)
    PDF representation of the Santa Ana Geologic map (19 MB)
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 1999
    Currentness_Reference:
    publication date
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: map
  6. 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):
      • Entity point
      • complete chain
      • GT-polygon composed of chains
    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: 0.9996
      Longitude_of_Central_Meridian: -117
      Latitude_of_Projection_Origin: 0.0
      False_Easting: 500000
      False_Northing: 0.0
      The horizontal datum used is NAD27.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.
      The flattening of the ellipsoid used is 1/294.98.
  7. How does the data set describe geographic features?
    SA_GEOL.PAT
    Geologic map units of the Santa Ana quadrangle (Source: OFR-99-0172)
    PTYPE and PLABL
    Map unit symbol (Source: OFR-99-0172)
    ValueDefinition
    QafArtificial fill (late Holocene)
    QwWash deposits (late Holocene)
    QfAlluvial fan deposits (late Holocene)
    QaActive axial channel deposits (late Holocene)
    QvActive valley deposits (late Holocene)
    QcColluvium (late Holocene)
    QlsLandslide deposits (late Holocene)
    QeEolian deposits (late Holocene)
    QmMarine deposits (late Holocene)
    QesEstuarine deposits (late Holocene)
    QlLacustrine deposits (late Holocene)
    QlvLacustrine and fluvial deposits (late Holocene)
    QywYoung alluvial wash deposits (Holocene and latest Pleistocene)
    QyfYoung alluvial fan deposits (Holocene and latest Pleistocene)
    Qyf4Young alluvial fan deposits, Unit 4 (late Holocene and latest Pleistocene)
    Qyf3Young alluvial fan deposits, Unit 3 (late and middle Holocene)
    Qyf2Young alluvial fan deposits, Unit 2 (early Holocene)
    Qyf1Young alluvial fan deposits, Unit 1 (early Holocene and late Pleistocene)
    QyaYoung axial channel deposits (Holocene and latest Pleistocene)
    QyvYoung alluvial valley deposits (Holocene and late Pleistocene)
    Qyv1Young alluvial valley deposits, Unit 1 (early Holocene and late Pleistocene)
    QylsYoung landslide (Holocene and latest Pleistocene)
    QyeYoung eolian deposits (Holocene and latest Pleistocene)
    QyptYoung peat deposits (Holocene)
    QowOld alluvial wash deposits (late to middle Pleistocene)
    QofOld alluvial fan deposits (late to middle Pleistocene)
    Qof1Old alluvial fan deposits, Unit 1 (late to middle Pleistocene)
    QofvOld alluvial fan deposits and young alluvial valley deposits (Holocene and late to middle Pleistocene)
    QoaOld axial channel deposits (late to middle Pleistocene)
    Qoa1Old axial channel deposits, Unit 1 (middle Pleistocene)
    QovOld alluvial valley deposits (late to middle Pleistocene)
    QocOld colluvial deposits (late to middle Pleistocene)
    QolsOld landslide deposits (late to middle Pleistocene)
    QomOld marine deposits (late to middle Pleistocene)
    QvofVery old alluvial fan deposits (middle to early Pleistocene)
    Qvof2Very old alluvial fan deposits, Unit 2 (early Pleistocene)
    Qvof1Very old alluvial fan deposits, Unit 1 (early Pleistocene)
    QvoaVery old axial channel deposits (middle to early Pleistocene)
    Qvoa2Very old axial channel deposits, Unit 2 (early Pleistocene)
    Qvoa1Very old axial channel deposits, Unit 1 (early Pleistocene)
    QvolsVery old landslide deposits (middle to early Pleistocene)
    QvomVery old marine deposits (middle to early Pleistocene)
    QrRegolith (Pleistocene)
    QpfPauba Formation (Pleistocene)
    QpfsSandstone member
    QpffFanglomerate member
    QlhLa Habra Formation (Pleistocene)
    QchCoyote Hills Formation (Pleistocene)
    QspSan Pedro Formation (Pleistocene)
    QTswSandstone unit: Sandstone and conglomerate of Wildomar area (Pleistocene and Pliocene)
    QTcwConglomerate unit: Sandstone and conglomerate of Wildomar area (Pleistocene and Pliocene)
    QTsUnnamed late Cenozoic sedimentary rocks in Riverside and Corona areas (early Pleistocene to late Pliocene?)
    QTtLate Cenozoic conglomerate of Temescal area (early Pleistocene to late Pliocene?)
    QTcConglomeratic sedimentary rocks of Riverside West 7.5' quadrangle (early Pleistocene to late Pliocene?)
    QTnLate Cenozoic sedimentary rocks of Norco area (early Pleistocene to late Pliocene?)
    QTstuUpper member (Pleistocene): San Timoteo beds of Frick (1921) (Pleistocene and Pliocene)
    QTstsConglomeratic sandstone beds: San Timoteo beds of Frick (1921) (Pleistocene and Pliocene)
    QTstcQuartzite-bearing conglomerate beds: San Timoteo beds of Frick (1921) (Pleistocene and Pliocene)
    TstmMiddle member (Pliocene): San Timoteo beds of Frick (1921) (Pleistocene and Pliocene)
    TstlLower member (Pliocene): San Timoteo beds of Frick (1921) (Pleistocene and Pliocene)
    TtaTemecula Arkose (Pliocene)
    TfFernando Formation (Pliocene)
    TfuUpper Member: Fernando Formation (Pliocene)
    TflLower Member: Fernando Formation (Pliocene)
    TnNiguel Formation (Pliocene)
    TnsSandstone of Norco area (Pliocene)
    TcCapistrano Formation (early Pliocene and Miocene)
    TcoOso Member: Capistrano Formation (early Pliocene and Miocene)
    TcsSiltstone facies: Capistrano Formation (early Pliocene and Miocene)
    TmeusUpper sandstone member (early Pliocene and Miocene): Mount Eden Formation of Fraser (1931) (early Pliocene and Miocene)
    TmemMudrock member (early Pliocene and Miocene): Mount Eden Formation of Fraser (1931) (early Pliocene and Miocene)
    TmelsLower sandstone member (Miocene): Mount Eden Formation of Fraser (1931) (early Pliocene and Miocene)
    TmeaArkosic sandstone member (Miocene): Mount Eden Formation of Fraser (1931) (early Pliocene and Miocene)
    TmecConglomeratic sandstone member (Miocene): Mount Eden Formation of Fraser (1931) (early Pliocene and Miocene)
    TchSandstone and conglomerate in southeastern Chino Hills (early Pliocene and Miocene)
    TpPuente Formation (early Pliocene and Miocene)
    TpscSycamore Canyon Member (early Pliocene and Miocene)
    TpyYorba Member (Miocene)
    TpsSoquel Member (Miocene)
    TplvLa Vida Member (Miocene)
    TlmLake Mathews Formation (Miocene)
    TcgrRhyolite clast conglomerate of Lake Mathews area (Miocene?)
    TcgConglomerate of Lake Mathews area (Miocene?)
    TmMonterey Formation (Miocene)
    TvsrSanta Rosa basalt of Mann (1955) (Miocene)
    TvtBasalt of Temecula area (Miocene)
    TvhBasalt of Hogbacks (Miocene)
    TvepBasalt of Elsinore Peak (Miocene)
    TsobSan Onofre Breccia (middle Miocene)
    TtTopanga Formation (middle Miocene)
    TtpPaulerino Member: Topanga Formation (middle Miocene)
    TtltLos Trancos Member: Topanga Formation (middle Miocene)
    TtbBommer Member: Topanga Formation (middle Miocene)
    TvemEl Modeno Volcanics (middle Miocene)
    TvemaAndesitic volcanic rocks: El Modeno Volcanics (middle Miocene)
    TvemtTuff and tuff breccia: El Modeno Volcanics (middle Miocene)
    TvembBasalt: El Modeno Volcanics (middle Miocene)
    TaAndesitic intrusive rocks (middle Miocene): Volcanic intrusive rocks associated with El Modeno Volcanics (middle Miocene)
    TdDiabase intrusive rocks (middle Miocene): Volcanic intrusive rocks associated with El Modeno Volcanics (middle Miocene)
    TvssVaqueros, Sespe, Santiago, and Silverado Formations, undivided (early Miocene, Oligocene, and Paleocene)
    TvVaqueros Formation (early Miocene, Oligocene, and late Eocene)
    TsSespe Formation (early Miocene, Oligocene, and late Eocene)
    TvsSespe and Vaqueros Formations, undifferentiated (early Miocene, Oligocene, and late Eocene)
    TcgaConglomerate of Arlington Mountain (Paleogene?)
    TepSandstone of Elsinore Peak (Paleogene?)
    TsaSantiago Formation (middle Eocene)
    TsiSilverado Formation (Paleocene)
    KwlWilliams and Ladd Formations, undifferentiated (upper Cretaceous)
    KwWilliams Formation (upper Cretaceous)
    KwpsPleasants Sandstone Member: Williams Formation (upper Cretaceous)
    KwsrSchulz Ranch Sandstone Member: Williams Formation (upper Cretaceous)
    KwstStarr Member: Williams Formation (upper Cretaceous)
    KlLadd Formation (upper Cretaceous)
    KlhsHolz Shale Member: Ladd Formation (upper Cretaceous)
    KlbcBaker Canyon Conglomerate Member (upper Cretaceous): Ladd Formation (upper Cretaceous)
    KtrTrabuco Formation (upper Cretaceous)
    KlctTonalite of Lamb Canyon (Cretaceous)
    KmegGranite of Mount Eden (Cretaceous)
    KthgdGranodiorite of Tucalota Hills (Cretaceous)
    KltTonalite near mouth of Laborde Canyon (Cretaceous)
    KhqdHypersthene quartz diorite (Cretaceous)
    KtcgMonzogranite of Tres Cerritos (Cretaceous)
    KpPegmatite dikes: Lakeview Mountains pluton (Cretaceous)
    KlmtTonalite: Lakeview Mountains pluton (Cretaceous)
    KlmlLeucocratic rocks: Lakeview Mountains pluton (Cretaceous)
    KlmmMelanocratic rocks: Lakeview Mountains pluton (Cretaceous)
    KlmcComb-layered gabbro: Lakeview Mountains pluton (Cretaceous)
    KlmgHypersthene hornblende gabbro: Lakeview Mountains pluton (Cretaceous)
    KlmtgLakeview Mountains tonalite and granodiorite, undifferentiated: Lakeview Mountains pluton (Cretaceous)
    KrctTonalite of Reinhardt Canyon pluton (Cretaceous)
    KbpgMonzogranite of Bernasconi Pass (Cretaceous)
    KbpmMigmatitic rock within Monzogranite of Bernasconi Pass: Monzogranite of Bernasconi Pass (Cretaceous)
    KtbhTonalite of Bernasconi Hills (Cretaceous)
    KpGranitic pegmatite dikes: Box Springs plutonic complex (Cretaceous)
    KbtBiotite tonalite: Box Springs plutonic complex (Cretaceous)
    KbfgBiotite granodiorite and tonalite: Box Springs plutonic complex (Cretaceous)
    KbfgiBiotite granodiorite and tonalite containing abundant inclusions: Box Springs plutonic complex (Cretaceous)
    KbhgHeterogeneous porphyritic granodiorite: Box Springs plutonic complex (Cretaceous)
    KbhglLayered heterogeneous porphyritic granodiorite: Box Springs plutonic complex (Cretaceous)
    KbgPorphyritic granodiorite: Box Springs plutonic complex (Cretaceous)
    KbftBiotite-hornblende tonalite: Box Springs plutonic complex (Cretaceous)
    KbhtHeterogeneous biotite tonalite: Box Springs plutonic complex (Cretaceous)
    KbgtHeterogeneous granodiorite and tonalite: Box Springs plutonic complex (Cretaceous)
    KbaAmphibolitic gabbro: Box Springs plutonic complex (Cretaceous)
    KvtVal Verde tonalite: Val Verde pluton (Cretaceous)
    KvtkPotassium feldspar-bearing tonalite: Val Verde pluton (Cretaceous)
    KvtiInclusion-rich tonalite: Val Verde pluton (Cretaceous)
    KgrGranophyre (Cretaceous)
    KgabHeterogeneous mixture of olivine, pyroxene, and hornblende gabbros: Green Acres gabbro complex (Cretaceous)
    KgaoOlivine gabbro: Green Acres gabbro complex (Cretaceous)
    KgahHornblende-rich gabbro: Green Acres gabbro complex (Cretaceous)
    KgatTroctolite: Green Acres gabbro complex (Cretaceous)
    KgaaAnorthositic gabbro: Green Acres gabbro complex (Cretaceous)
    KgamMetagabbro: Green Acres gabbro complex (Cretaceous)
    KggHypersthene monzogranite: Gavilan ring complex (Cretaceous)
    KgtMassive textured tonalite: Gavilan ring complex (Cretaceous)
    KgtfFoliated tonalite: Gavilan ring complex (Cretaceous)
    KgtiTonalite containing abundant mesocratic inclusions: Gavilan ring complex (Cretaceous)
    KghHypabyssal tonalite: Gavilan ring complex (Cretaceous)
    KgctCoarse-grained biotite-hornblende tonalite: Gavilan ring complex (Cretaceous)
    KghtHeterogeneous tonalite: Gavilan ring complex (Cretaceous)
    KmpMicropegmatite granite (Cretaceous)
    KmpcMicropegmatite and granodiorite of Cajalco pluton, undifferentiated (Cretaceous)
    KtdTonalite dikes of Mount Rubidoux (Cretaceous)
    KmrgGranite of Mount Rubidoux (Cretaceous)
    KrgGranite of the Riverside area (Cretaceous)
    KmhgMount Hole Granodiorite (Cretaceous)
    KlstLa Sierra Tonalite (Cretaceous)
    KatgGranodiorite of Arroyo del Toro pluton (Cretaceous)
    KctoTourmalized monzogranite and granodiorite: Cajalco pluton (Cretaceous)
    KcgMonzogranite: Cajalco pluton (Cretaceous)
    KcgdGranodiorite: Cajalco pluton (Cretaceous)
    KctTonalite: Cajalco pluton (Cretaceous)
    KcgqGranodiorite and quartz latite, undifferentiated: Cajalco pluton (Cretaceous)
    KcgbGranodiorite and gabbro, undifferentiated: Cajalco pluton (Cretaceous)
    KldQuartz latite dikes: Domenigoni Valley pluton (Cretaceous)
    KdvgGranodiorite to tonalite of Domenigoni Valley: Domenigoni Valley pluton (Cretaceous)
    KgbfFine grained hornblende gabbro, Railroad Canyon area (Cretaceous): Domenigoni Valley pluton (Cretaceous)
    KpvgrGranophyre: Paloma Valley Ring Complex (Cretaceous)
    KpPegmatite dikes of Paloma Valley Ring Complex: Paloma Valley Ring Complex (Cretaceous)
    KpvgMonzogranite to granodiorite: Paloma Valley Ring Complex (Cretaceous)
    KpvtTonalite: Paloma Valley Ring Complex (Cretaceous)
    KpvgbGranodiorite and gabbro, undivided: Paloma Valley Ring Complex (Cretaceous)
    KsmgMonzogranite of Squaw Mountain (Cretaceous)
    KtsTonalite of Slaughterhouse Canyon (Cretaceous)
    KpGranitic Pegmatite dikes (Cretaceous)
    KgGranitic dikes. (Cretaceous)
    KguUndifferentiated granite (Cretaceous
    KgdGranodiorite, undifferentiated (Cretaceous)
    KtTonalite, undifferentiated (Cretaceous)
    KtmTonalite and mafic rock, undifferentiated (Cretaceous)
    KqdQuartz diorite (Cretaceous)
    KdqdDiorite and quartz diorite, undifferentiated (Cretaceous)
    KdDiorite, undifferentiated (Cretaceous)
    KgbGabbro (Cretaceous)
    KhgHeterogeneous granitic rocks (Cretaceous)
    KsSerpentinite (Cretaceous)
    KcCarbonate-silicate rock (Cretaceous)
    KvspSantiago Peak Volcanics (Cretaceous)
    KvspiIntrusive rocks associated with Santiago Peak Volcanics (Cretaceous)
    KvemEstelle Mountain volcanics of Herzig (1991) (Cretaceous)
    KvrRhyolite of Estelle Mountains volcanics of Herzig (1991) (Cretaceous)
    KsvIntermixed Estelle Mountain volcanics of Herzig (1991) and Cretaceous(?) sedimentary rocks (Cretaceous?)
    KvsIntermixed Estelle Mountain volcanics of Herzig (1991) and Mesozoic sedimentary rocks (Mesozoic)
    MzmgMylonitic and cataclastic granitic rocks: Deformed granitic rocks of Transverse Ranges Province (Mesozoic)
    MzdDiorite: Deformed granitic rocks of Transverse Ranges Province (Mesozoic)
    JbcBedford Canyon Formation (Jurassic)
    JbmMarble (limestone)
    MzuMesozoic metasedimentary rocks, undifferentiated (Mesozoic)
    MzgGraywacke (Mesozoic)
    MzqQuartz-rich rocks (Mesozoic)
    MzqgIntermixed quartzite and graywacke (Mesozoic)
    MzgpIntermixed graywacke and phyllite (Mesozoic)
    MzpPhyllite (Mesozoic)
    MzsSchist (Mesozoic)
    MzmMarble (Mesozoic)
    MziInterlayered phyllite (or schist) and quartzite (Mesozoic)
    MzdsMetadunite and serpentinite (Mesozoic)
    MzdxAmphibole- and pyroxene-bearing rocks associated with metadunite-serpentinite (Mesozoic)
    MzdcMarble associated with metadunite (Mesozoic)
    MzmnManganese-bearing rocks (Mesozoic)
    PzuPaleozoic(?) rocks, undifferentiated (Paleozoic?)
    PzsBiotite Schist (Paleozoic?)
    PzqImpure quartzite (Paleozoic?)
    PzmMarble (Paleozoic?)
    PzcCalc-silicate rocks (Paleozoic?)
    PzmsMarble and schist, undivided (Paleozoic?)
    PzaAmphibolite (Paleozoic?)
    KgMzIntermixed Mesozoic schist and Cretaceous granitic rocks (Mesozoic)
    KgPzIntermixed Paleozoic(?) schist and Cretaceous granitic rocks (Mesozoic and Paleozoic?)
    SHD
    Color shade for printing purposes (Source: OFR-99-0172)
    Range of values
    Minimum:0
    Maximum:939
    SA_GEOL.AAT
    Linear geologic features (Source: OFR-99-0172)
    LTYPE
    line type (Source: OFR-99-0172)
    ValueDefinition
    KctoKcto dike
    KgKg dike
    KgbdKgbd dike
    KldKld dike
    KpKp dike
    KvspiKvspi dike
    MzmnMzmn dike
    contact, certainObserved contact
    fault, certainObserved fault
    fault, approx. locatedFault whose position is not precisely known
    fault, concealedConcealed fault whose position is inferred
    fault, queriedfault, location or existence uncertain
    ground fissureObserved ground fissure
    map boundaryboundary of quadrangle
    scratch boundaryscratch boundary
    sutureProbable suture, approximately located
    water boundaryBoundaries of bodies of water
    SA-GEOL.PAT
    Point attributes of map units (same attributes as the polygon coverage SA_GEOL.PAT) (Source: OFR-99-0172)
    SA_HYDR.PAT
    Mapped bodies of water (Source: OFR-99-0172)
    PTYPE
    Polygon type (Source: OFR-99-0172)
    ValueDefinition
    bays, estuaries, gulfs, oceans, seas 
    duck pond 
    gravle pit or quarry; filled with water 
    intermittent lake or pond 
    inundation area 
    lake or pond 
    navigatable, transportation, bays, estuaries, gulfs, oceans, seas 
    reservoir 
    void areaunmapped area
    water surface elevation; 241 m; reservoir 
    water surface elevation; 376m; lake or pond 
    water surface elevation; 420m; reservoir; interpolated elevation 
    water surface elevation; 424m; lake or pond 
    water surface elevation; 433m 
    SA_HYDR.PAT
    Hydrology at specific points (same attributes as the polygon coverage SA_HYDR.PAT) (Source: OFR-99-0172)
    SA_HYPS.AAT
    Topography contour lines (Source: OFR-99-0172)
    LTYPE
    Line type (Source: OFR-99-0172)
    ValueDefinition
    contourcontour (50m)
    depression contourdepression contour (50m)
    index contourindex contour (250m)
    index contour and labelindex contour (250m) with associated label
    map boundaryboundary of mapped quadrangle
    ELEV
    Elevation of contour line (Source: OFR-99-0172)
    Range of values
    Minimum:0
    Maximum:1700
    Units:meters
    Resolution:50
    SA_POINT.AAT
    Fold axes (Source: OFR-99-0172)
    LTYPE
    Line type (Source: OFR-99-0172)
    ValueDefinition
    fold axis, approx. locatedFold axis whose position is not precisely known
    fold axis, certainobserved fold axis
    fold axis, concealedFold axis that is concealed and position inferred
    SA_POINT.PAT
    Fold axis ornamentation (Source: OFR-99-0172)
    PTTYPE
    Point type (Source: OFR-99-0172)
    ValueDefinition
    anticline symbolsymbol for anticline fold axis
    direction of plungeplunge of fold axis symbol
    overturned synclineOverturned syncline symbol
    syncline symbolsymbol for syncline fold axis
    STRIKE
    Stike of fold axes (Source: OFR-99-0172)
    Range of values
    Minimum:11
    Maximum:354
    Units:degrees
    Resolution:1
    SA_STRUC.PAT
    Attitudes and their dip values. Dip values plotted as annotation. Map boundary lines. (Source: OFR-99-0172)
    PTTYPE
    Point type (Source: OFR-99-0172)
    ValueDefinition
    bedding 
    dip of fault surface 
    horizontal bedding 
    igneous foliation 
    lineation 
    lineation of attitude 
    metamorphic foliation 
    metamorphic vertical foliation 
    overturned bedding 
    vertical bedding 
    vertical igneous foliation 
    DIP
    Dip attitudes (Source: OFR-99-0172)
    Range of values
    Minimum:0
    Maximum:90
    Units:degrees
    Resolution:1
    STRIKE
    Strike attitudes (Source: OFR-99-0172)
    Range of values
    Minimum:0
    Maximum:359
    Units:degrees
    Resolution:1
    SA_TRANS.AAT
    Roads (for more information see a road map) (Source: OFR-99-0172)
    Entity_and_Attribute_Overview:
    Attributes for coverage SA_HYDR.AAT:
    aqueduct
    closure line
    coincident feature; intermittent ditch
    ditch or canal
    ditch of canal; underpass; closure line
    indefinite shoreline
    intermittent
    intermittent aqueduct; coincident feature 30
    intermittent ditch of canal
    intermittent shoreline
    intermittent stream
    intermittent stream; coincident feature 9
    intermittent stream; underground, closure line
    intermittent stream; underpass; closure line
    intermittent underground aqueduct
    manmade shoreline
    map boundary
    shoreline
    shoreline; coincident feature
    siphon
    stream
    stream; coincident feature 9
    stream; underpass closure line
    tunnel; aqueduct
    tunnel; ditch of canal
    underground aqueduct
    underground aqueduct; coincident feature 17
    underground aqueduct; incident feature
    underground aqueduct; tunnel
    underground closure line
    underground ditch or canal
    underground tunnel; aqueduct
    underpass; closure line; ditch or canal
    underpass; ditch or canal; closure line
    wash or ephemeral
    wash or ephemeral drain
    wash or ephemeral drain; underpass closure line
    water surface elevation 420m; lake; interpolated elevation
    
    Explanation for the Santa Ana 30' X 60' quadrangle:
    A question mark (?) indicates the idenity of a map unit or age of a unit is uncertain. For units submerged below the present day water level of Lake Perris, an (s) follows the unit symbol. The subscripts used for relative age subdivisions of some Quaternary deposits designate decreasing age by increasing numbers, e.g. Qyf4 is younger than Qyf3. Where known, grain size is indicated by a subscripted letter or letters following unit symbols as follows: b, boulder; g, gravel; a, arenaceous; s, silt, c, clay; e.g. Qyfa is a predominately sandy young alluvial fan deposit. Multiple letters are used for more specific identification or for mixed units, e.g., Qyfsa is a silty sand. In some cases, mixed units are indicated by a compound symbol; e.g., Qyf2sc. Marine deposits are in part overlain by local, mostly alluvial fan, deposits and are labeled Qomf. Grain size follows f. The Ma following U/Pb ages has an attached subscript; Maid for isotope dilution analyses, and Maip for ion probe analyses.
    Entity_and_Attribute_Detail_Citation: http://pubs.usgs.gov/of/1999/of99-172/sanana2dmu.doc

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • D.M. Morton
    • Rachel M. Hauser
    • Kelly R. Ruppert
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    D.M. Morton
    US Geological Survey
    Western Region Geologic Mapping Team
    US Geological Survey
    Department of Earth Sciences, University of California
    Riverside, CA
    USA


Why was the data set created?

To provide the public with access to the digital geologic map of the 30' X 60' Santa Ana Quadrangle

How was the data set created?

  1. From what previous works were the data drawn?
    Jahns (1954) (source 1 of 2)
    Jahns, R.H., 1954, Geology of the Peninsular Ranges Province, southern California and Baja California: California Division of Mines and Geology Bulletin 170.

    Other_Citation_Details: Chapter 2, p. 29-52
    Type_of_Source_Media: paper
    Source_Contribution:
    Summarized the general geology of the Peninsulr Ranges Province which includes the Santa Ana Quadrangle.
    Rogers (1965) (source 2 of 2)
    Rogers, T.H., 1965, Santa Ana sheet: California Division of Mines and Geology Geologic Map of California.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution:
    Published a generalized geologic map of this part of the Peninsular Ranges Province.
  2. How were the data generated, processed, and modified?
    (process 1 of 2)
    The geologic map was compiled from 31 1:24,000 7.5' quadrangles were mapped and (or) compiled chiefly at 1:24,000 scale. The compilation at 1:100,000 scale entailed necessary simplification in some areas and combining of some geologic units. Overall, however, despite a greater than four times reduction in scale, most geologic detail found on the 1:24,000 maps is retained on the 1:100,000 map. Geologic contacts across boundaries of the 31 constituent quadrangles required adjustments, but none significantly larger scale maps, the 1:100,000 scale compilation in this report is intended for use at that scale; digital or plotted enlargements of all or part of the map were not intended and could result in misleading map data. Lines, points, and polygons were edited using standard ARC/INFO commands, and in some places, interactively by hand using graphical user interface ALACARTE (Fitzbibbon, 1991, Fitzgibbon and Wentworth, 1991, Wentworth and Fitzgibbon, 1991). Digitizing and editing artifacts significant enough to display at a scale of 1:100,000 were corrected.
    Date: 08-Jun-2009 (process 2 of 2)
    Creation of original metadata record Person who carried out this activity:
    Jennifer Lenz
    US Geological Survey
    12201 Surise Valley Drive, Mail Stop 918
    Reston, VA
    USA

    703-648-6974 (voice)
    703-648-6560 (FAX)
    pschweitzer@usgs.gov
  3. What similar or related data should the user be aware of?

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

  1. How well have the observations been checked?
    All contacts on the geologic map are shown as solid lines. Until uniform National geologic map accuracy standards are developed and adopted, lines and points on SCAMP 1:100,000 scale geologic maps that are located to within 50 meters, relative to accurates located features on the base map, are considered to meet map accuracy standards. Published and unpublished mapping by the compiler are known to generally meet this map accuracy standard. Most, but not all, mapping compiled from other sources is known to generally meet this map accuracy standard.
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    complete
  5. How consistent are the relationships among the observations, including topology?
    This geologic map was compiled from multiple sources and were made to be as consisent as possible.

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: none
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey Information Services
    Box 25248, Denver Federal Center
    Denver, CO
    USA

    1-888-ASK-USGS (voice)
    1-303-202-4693 (FAX)
    infoservices@usgs.gov
  2. What's the catalog number I need to order this data set? USGS Open-File Report 99-0172
  3. What legal disclaimers am I supposed to read?
    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.
    This database, identified as "Preliminary digital geologic map of the Santa Ana 30' x 60' quadrangle, Southern California, Version 1.0" has been approved for release and publication by the Director of the USGS. Although this database has been reviewed and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. This database is released on condition that neither the USGS nor the U. S. Government may be held liable for any damages resulting from its use.
  4. How can I download or order the data?
    • Availability in digital form:
      Data format:
      ARC/INFO coverages
      sa_geol: Contacts, faults, geologic unit labels
      sa_struc: Attitudes and their dip values. Dip values plotted as annotation.  Map boundary lines.
      sa_point: Fold axes and line ornamentation symbols.
      sa_anno: Annotations and leaders for unit labels.
      sa_hydr: Water bodies.
      sa_hyps: Topography.
      sa_trans: Roads, cultural information.
      
      in format ARCE (version ARC/INFO version 7.1.1 produced the export files) Size: 17
      Network links: http://pubs.usgs.gov/of/1999/of99-172/sanana2.zip
    • Cost to order the data: none


Who wrote the metadata?

Dates:
Last modified: 05-Feb-2016
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 for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://geo-nsdi.er.usgs.gov/metadata/open-file/99-172/metadata.faq.html>
Generated by mp version 2.9.48 on Tue Jul 03 20:07:17 2018