Metadata: Identification_Information: Citation: Citation_Information: Originator: Clark, J.C. Originator: Brabb, E.E. Originator: Rosenberg, L.I. Originator: Goss, H.V. Originator: Watkins, S.E. Publication_Date: 2000 Title: Geologic map and map database of the Spreckels 7.5-minute quadrangle, Monterey County, California Edition: 1.0 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Field Studies Map Issue_Identification: 2349 Publication_Information: Publication_Place: Menlo Park, CA Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/mf/2001/2349/ Description: Abstract: This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits in the mapped area. Together with the accompanying text file (skmf.txt, skmf.pdf, or skmf.ps), it provides current information on the geologic structure and stratigraphy of the area covered. The database delineates map units that are identified by general age and lithology following the stratigraphic nomenclature of the U.S. Geological Survey. The scale of the source maps limits the spatial resolution (scale) of the database to 1:24,000 or smaller. Purpose: This database and accompanying plot files depict the distribution of geologic materials and structures at a scale of 1:24,000. The report is intended to provide geologic information for the regional study of materials properties, earthquake shaking, landslide potential, mineral hazards, seismic velocity, and earthquake faults. In addition, the report contains new information and interpretations about the regional geologic history and framework. However, the regional scale of this report does not provide sufficient detail for site development purposes. In addition, this map does not take the place of fault-rupture hazard zones designated by the California State Geologist (Hart and Bryant, 1997). Similarly, the database cannot be used to accurately identify or delineate landslides in the region. Supplemental_Information: This report consists of a set of geologic map database files (Arc/Info coverages) and supporting text and plotfiles. In addition, the report includes two sets of plotfiles (PostScript and PDF format) that will generate map sheets and pamphlets similar to a traditional USGS Miscellaneous Field Studies Report. These files are described below: >ARC/INFO Resultant Description of Coverage >export file Coverage >----------- ----------- -------------------------------- >sk-geol.e00 sk-geol/ Polygon and line coverage showing > faults, depositional contacts, and > rock units in the map area. > >sk-strc.e00 sk-strc/ Point and line coverage showing > strike and dip information and fold axes. > >sk-lnds.e00 sk-lnds/ Point and line coverage showing arrows > indicating landslide directions as well > as the locations of wells and springs > not included in the topographic base map. ASCII text files, including explanatory text, ARC/INFO key files, PostScript and PDF plot files, and a ARC Macro Language file for conversion of ARC export files into ARC coverages: >skmf.ps A PostScript plot file of the pamphlet > containing detailed unit descriptions > and geological information, a description > of the digital files associated with the > publication, plus references cited. > >skmf.pdf A PDF version of mamf.ps. > >skmf.txt A text-only file containing an unformatted > version of skmf.ps. > >import.aml ASCII text file in ARC Macro Language to > convert ARC export files to ARC coverages > in ARC/INFO. > >skmap.ps A PostScript plottable file containing > an image of the geologic map and base > maps at a scale of 1:24,000, along with > a simple map key. > >skmap.pdf A PDF file containing an image of the > geologic map and base maps at a scale > of 1:24,000, along with a simple map key. Base maps Base Map layers used in the preparation of the geologic map plotfiles were derived from published digital maps (Aitken, 1997). The base map digital files are not included in the digital database package. Other_References_Cited: Barron, J.A., 1976, Marine diatom and silicoflagellate biostratigraphy of the type Delmontian Stage and the type Bolivina obliqua Zone, California: U.S. Geological Survey Journal of Research, v. 4, no. 3, p. 339-351. Bowen, O.E., Jr., 1965, Stratigraphy, structure, and oil possibilities in Monterey and Salinas quadrangles, California, in Rennie, E.W. Jr., ed., Symposium of papers presented at the fortieth annual Pacific Section A.A.P.G. convention: American Association of Petroleum Geologists, Pacific Section, Bakersfield, Calif., p. 48-67. _____[1969], Geologic map of the Spreckels 7.5-minute quadrangle: California Division of Mines and Geology unpublished map, scale 1:24,000. Bryant, W.A., 1985, Faults in the southern Monterey Bay area, Monterey County, California: California Division of Mines and Geology Fault Evaluation Report FER-167, 13 p., 5 map sheets, scale 1:24,000. Cassell, G.K., 1949, Variation in the Monterey Formation near the type locality: Stanford, Calif., Stanford University M.S. thesis. Clark, J.C., Dupré, W.R., and Rosenberg, L.I., 1997, Geologic map of the Monterey and Seaside 7.5-minute quadrangles, Monterey County, California: a digital database: U.S. Geological Survey Open-File Report 97-30, 32 p., 2 sheets, scale 1:24,000. Cotton, William, and Associates, 1983, Preliminary geotechnical evaluation, San Benancio Canyon landslide, Monterey County, California: unpublished report to Monterey County Department of Public Works, 3 p. Curry, R.R., 1984, Observations on Quaternary and recent fault activity, central coastal California: Monterey Peninsula Water Management District open-file report, 11 p. Dibblee, T.W., Jr., 1973, Geologic map of the Salinas 15-minute quadrangle, Monterey County, California: U.S. Geological Survey Open-File Report 74-1021, scale 1:62,500. Dupré, W.R., 1990a, Maps showing geology and liquefaction susceptibility of Quaternary deposits in the Monterey, Seaside, Spreckels, and Carmel Valley quadrangles, Monterey County, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-2096, 2 sheets, scale 1:24,000. _____1990b, Quaternary geology of the Monterey Bay region, California, in Garrison, R.E., Greene, H.G., Hicks, K.R., Weber, G.E., and Wright, T.L., eds., Geology and tectonics of the central California coastal region, San Francisco to Monterey: American Association of Petroleum Geologists, Volume and Guidebook GB67, Pacific Section, Bakersfield, Calif., p. 185-191. Dupré, W.R., and Tinsley, J.C., III, 1980, Maps showing geology and liquefaction potential of northern Monterey and southern Santa Cruz Counties, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-1199, 2 sheets, scale 1:62,500. Fiedler, W.M., 1944, Geology of the Jamesburg quadrangle, Monterey County, California: California Division of Mines, Report XL of the State Mineralogist, v. 40, no. 2, p. 177-250, 2 map sheets, scale 1:62,500. Govean, F.M., and Garrison, R.E., 1981, Significance of laminated and massive diatomites in the upper part of the Monterey Formation, California, in Garrison, R.E., and Douglas, R.G., eds., The Monterey Formation and related siliceous rocks of California: Los Angeles, Calif., Society of Economic Paleontologists and Mineralogists, Pacific Section, p. 181-198. Herold, C.L., 1935, Preliminary report on the geology of the Salinas quadrangle, California: Berkeley, University of California M.S. thesis, 143 p., 2 sheets, scale 1:62,500. Jacobson, C.E., Barth, A.P., and Grove, Marty, 2000, Late Cretaceous protolith age and provenance of the Pelona and Orocopia Schists, southern California: Implications for evolution of the Cordilleran margin: Geology, v. 28, no. 3, p. 219-222. Lawson, A.C., chairman, 1908, The California earthquake of April 18, 1906: Report of the California State Earthquake Investigation Commission: Washington D.C., Carnegie Institution of Washington, Publication 87, v. 1, 2 parts, 451 p. McCulloch, D.S., and Greene, H.G., 1989, Geologic map of the central California continental margin, in Greene, H.G., and Kennedy, M.P., eds., Geology of the central California continental margin: California Division of Mines and Geology California Continental Margin Geologic Map Series, Map 5A, scale 1:250,000. Petersen, M.D., Bryant, W.A., Cramer, C.H., Cao, T., Reichle, M.S., Frankel, A.D., Lienkaemper, J.J., McCrory, P.A., and Schwartz, D.P., 1996, Probabilistic seismic hazard assessment for the State of California: California Division of Mines and Geology Open-File Report 96-08 and U.S. Geological Survey Open-File Report 96-706, 33 p., 2 appendices. Rosenberg, L.I., and Clark, J.C., 1994, Quaternary faulting of the greater Monterey area, California: U.S. Geological Survey Final Technical Report 1434-94-G-2443, 45 p., 3 appendices, 4 sheets, scale 1:24,000. Ross, D.C., 1976a, Reconnaissance geologic map of pre-Cenozoic basement rocks, northern Santa Lucia Range, Monterey County, California: U.S. Geological Survey Miscellaneous Field Studies Map MF-750, 7 p., 2 sheets, scale 1:125,000. _____1976b, Metagraywacke in the Salinian block, central Coast Ranges, California-and a possible correlative across the San Andreas fault: U.S. Geological Survey Journal of Research, v. 4, no. 6, p. 683-696. _____1977, Maps showing sample localities and ternary plots and graphs showing modal and chemical data for granitic rocks of the Santa Lucia Range, Salinian block, California Coast Ranges: U.S. Geological Survey Miscellaneous Field Studies Map MF-799, 16 p., 3 plates. Staal, Gardner & Dunne, 1988, Phase II hydrogeologic investigation, Laguna Seca subarea, Monterey County, California: Monterey County Health Department open-file report, 33 p., 6 appendices, 8 sheets, scale 1:12,000. _____1991a, Hydrogeologic update, El Toro area, Monterey County, California: Monterey County Water Resources Agency open-file report, 53 p., 4 appendices. _____1991b, Laguna Seca Ranch, supplemental hydrogeologic assessment: unpublished letter report to Kimball Small Properties, 7 p. Terratech, 1989, Supplemental fault investigation, Las Palmas Ranch Development, Monterey County, California: Monterey County Planning and Building Inspection open-file report, 3 p. Thorup, R.R., 1980, Groundwater evaluation of the Flause property, Corral de Tierra Valley, Monterey County, California: unpublished report to Robert Flause, 19 p. Tinsley, J.C., III, 1975, Quaternary geology of the northern Salinas Valley, Monterey County, California: Stanford, Calif., Stanford University Ph.D. dissertation, 195 p., 2 sheets, scale 1:62,500. Tuzon, Brandy, 1997, Mud ravages San Benancio homes: Salinas, Calif., The Californian, January 29, 1997, p. 1A. Younse, G.A., 1980, The stratigraphy and phosphoritic rocks of the Robinson Canyon-Laureles Grade area, Monterey County, California: U.S. Geological Survey Open-File Report 80-318, 127 p., 5 sheets. Data_Set_Structure: Data_Set_Part: Part_Name: GIS data Part_Type: file Part_Description: ArcInfo GIS-ready data layers in .e00 format Data_Set_Part: Part_Name: sk-geol.e00 Part_Type: Arc/Info export file Part_Description: Polygon and line coverage showing faults, depositional contacts, and rock units in the map area. Data_Set_Part: Part_Name: sk-strc.e00 Part_Type: Arc/Info export file Part_Description: Point and line coverage showing strike and dip information and fold axes. Data_Set_Part: Part_Name: sk-lnds.e00 Part_Type: Arc/Info export file Part_Description: Point and line coverage showing arrows indicating landslide directions as well as the locations of wells and springs not included in the topographic base map. Data_Set_Part: Part_Name: Ancilliary data Part_Type: file Part_Description: ASCII text files, including explanatory text, ARC/INFO key files, PostScript and PDF plot files, and a ARC Macro Language file for conversion of ARC export files into ARC coverages: Data_Set_Part: Part_Name: skmf.ps Part_Type: file, PostScript Part_Description: A PostScript plot file of the pamphlet containing detailed unit descriptions and geological information, a description of the digital files associated with the publication, plus references cited. Data_Set_Part: Part_Name: skmf.pdf Part_Type: file, PDF Part_Description: A PDF version of mamf.ps. Data_Set_Part: Part_Name: skmf.txt Part_Type: file, ASCII Part_Description: A text-only file containing an unformatted version of skmf.ps. Data_Set_Part: Part_Name: import.aml Part_Type: file, text (AML) Part_Description: ASCII text file in ARC Macro Language to convert ARC export files to ARC coverages in ARC/INFO. Data_Set_Part: Part_Name: skmap.ps Part_Type: file, PostScript Part_Description: A PostScript plottable file containing an image of the geologic map and base maps at a scale of 1:24,000, along with a simple map key. Data_Set_Part: Part_Name: skmap.pdf Part_Type: file, PDF Part_Description: A PDF file containing an image of the geologic map and base maps at a scale of 1:24,000, along with a simple map key. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2000 Currentness_Reference: The date given is the publication date. The information in the report is the most up-to-date available at the time of publication. Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -121.7500000 East_Bounding_Coordinate: -121.6216666 North_Bounding_Coordinate: 36.62166666 South_Bounding_Coordinate: 36.75000000 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: structural geology Theme_Keyword: stratigraphy Theme_Keyword: faulting (geologic) Theme_Keyword: geologic maps Theme_Keyword: bedrock geologic units Theme_Keyword: surficial geologic units Theme_Keyword: landslides Theme_Keyword: lithostratigraphy Theme_Keyword: tectonic processes Theme_Keyword: geospatial datasets Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Categories Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: geology Theme_Keyword: bedrock geology Theme_Keyword: surficial geology Theme_Keyword: geologic history Theme_Keyword: tertiary paleontology Theme_Keyword: fault geometry Theme_Keyword: fault activity Theme_Keyword: terranes Theme_Keyword: geologic structures Theme_Keyword: oil wells Theme_Keyword: Laureles fault Theme_Keyword: Chupines fault Theme_Keyword: Corral de Tierra fault Theme_Keyword: Harper fault Theme_Keyword: Las Palmas fault Theme_Keyword: Santa Margarita sandstone Theme_Keyword: Monterey formation Theme_Keyword: landslides Place: Place_Keyword_Thesaurus: none Place_Keyword: United States of America Place_Keyword: California Place_Keyword: Monterey County Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: Artificial fill Stratum_Keyword: Basin deposits Stratum_Keyword: Alluvial deposits, undivided Stratum_Keyword: Younger flood-plain deposits Stratum_Keyword: Older flood-plain deposits Stratum_Keyword: Colluvium Stratum_Keyword: Abandoned channel fill deposits Stratum_Keyword: Landslide deposits Stratum_Keyword: Terrace deposits, undivided Stratum_Keyword: Older eolian deposits Stratum_Keyword: Alluvial fan deposits of Chualar Stratum_Keyword: Alluvial fan deposits of Placentia Stratum_Keyword: Alluvial fan deposits of Gloria Stratum_Keyword: Continental deposits, undivided Stratum_Keyword: Santa Margarita Sandstone Stratum_Keyword: Monterey Formation, diatomite Stratum_Keyword: Monterey Formation, porcelinite Stratum_Keyword: Unnamed sandstone Stratum_Keyword: Unnamed sandstone, undifferentiated Stratum_Keyword: Unnamed conglomerate Stratum_Keyword: Granodiorite of Cachagua of Ross Stratum_Keyword: Garnetiferous quartz monzonite of Pine Canyon of Ross Stratum_Keyword: Hornblende-biotite quartz diorite and diorite of Corral de Tierra Stratum_Keyword: Schist of the Sierra de Salinas of Ross Stratum_Keyword: Quartzofeldspathic rocks Stratum_Keyword: Marble Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: Pre-Cretaceous Temporal_Keyword: Cretaceous Temporal_Keyword: Cenozoic Temporal_Keyword: Tertiary Temporal_Keyword: Miocene Temporal_Keyword: Pliocene Temporal_Keyword: Quaternary Temporal_Keyword: Pleistocene Temporal_Keyword: Holocene Place: Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4 Place_Keyword: f06053 = Monterey Access_Constraints: None Use_Constraints: Uses of this digital geologic map 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. The fact that this database was edited for a scale of 1:24,000 means that higher resolution information is 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 below the intended resolution of the database. Similarly, 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 of these data. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS Western Geologic Mapping Team Contact_Person: Database coordinator Contact_Address: Address_Type: mailing address Address: 345 Middlefield Road, MS 975 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/mf/2001/2349/skmap.pdf Browse_Graphic_File_Description: A PDF representation of the geologic map and base maps at a scale of 1:24,000 (Sheet 1). 7.6 megabytes. Browse_Graphic_File_Type: PDF Data_Set_Credit: David L. Wagner of the California Division of Mines and Geology ( CDMG) provided Clark and Rosenberg with funding for their 1998 field mapping. Wagner also coordinated the work of Sarah E. Watkins (CDMG), who digitized the geologic map for incorporation into the geologic map of the Monterey 1:100,000-scale quadrangle, which is in preparation. Andrei Sarna-Wojcicki (USGS) analyzed and correlated Miocene ash beds from the quadrangle. Charles Powell, II (USGS) identified and interpreted mollusks collected from the quadrangle by Brabb and Clark. He also examined and interpreted mollusks at the California Academy of Science collected by Bowen and at the Museum of Paleontology, University of California, Berkeley that had been collected and reported by Herold (1935). Kristin McDougall (USGS) identified and interpreted Miocene foraminifers. Victoria Langenheim (USGS) and Robert Jachens (USGS) kindly provided unpublished gravity and aeromagnetic data with an interpretation of regional faulting. Special thanks go to Richard R. Thorup for sharing his extensive knowledge of the geology of the quadrangle. Heather V. Goss (USGS and Environmental Careers Organization) added a structure layer, including strikes and dips and fold axes, to the digital map file, annotated and formatted the map to conform to USGS publication standards, and made corrections to the map after technical reviews. She wrote the metadata for the digital file, formatted the text to conform to USGS publication standards, and changed and added information after technical review. Native_Data_Set_Environment: SunOS, 5.5.1, sun4u UNIX, ARC/INFO version 7.2.1 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: This report has undergone two scientific peer reviews, one digital database review, one review for conformity with geologic names policy, and review of the plotfiles for conformity with USGS map standards. Logical_Consistency_Report: Polygon and chain-node topology present Completeness_Report: The report is intended to describe completely the bedrock geology at 1:24,000 scale. Geologic information only mappable at larger scale has been omitted. In addition, landslide deposits are for the most part not recorded. Further, Quaternary surficial deposits in many areas have been intentionally undifferentiated. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Well located data items are intended to have a horizontal positional accuracy within .62 mm at 1:24,000 scale, or within 15 meters on the ground. The general positional accuracy of each line in the database is indicated within the LTYPE field in the Arc Attribute Table (see below). Points in the database are generally considered to be well located. The position of each data item is derived from the USGS topographic base map, and therefore additional inaccuracies arising from inaccuracies in the base map may also be encountered. See Aitken (1997) for information regarding the horizontal positional accuracy of the basemaps. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: No vertical positional data recorded. See Aitken (1997) for information regarding the vertical positional accuracy of the basemaps used to create the plotfiles of the geologic maps. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Ross, D.C. Publication_Date: 1976 Title: Reconnaissance geologic map of pre-Cenozoic basement rocks, northern Santa Lucia Range, Monterey County, California Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Field Studies Map Issue_Identification: MF-750 Source_Scale_Denominator: 125000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1976 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Ross, 1976 Source_Contribution: Source map for basement rock distribution Source_Information: Source_Citation: Citation_Information: Originator: Dupre, W.R. Publication_Date: 1990 Title: Maps showing geology and liquefaction susceptibility of Quaternary deposits in the Monterey, Seaside, Spreckels, and Carmel Valley quadrangles, Monterey County, California Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Field Studies Map Issue_Identification: MF-2096 Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1990 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Dupre, 1990 Source_Contribution: Source map for Quaternery deposits Source_Information: Source_Citation: Citation_Information: Originator: Rosenberg, L.I. Publication_Date: (unpublished) Title: unpublished geologic investigations Type_of_Source_Media: paper Source_Citation_Abbreviation: Rosenberg (unpublished) Source_Contribution: Source for information on Quaternary deposits Source_Information: Source_Citation: Citation_Information: Originator: Brabb, E.E. Publication_Date: (unpublished) Title: unpublished geologic investigations Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1998 Source_Currentness_Reference: date material incoporated Source_Citation_Abbreviation: Brabb (unpublished) Source_Contribution: Source for information on landslide locations Source_Information: Source_Citation: Citation_Information: Originator: Bowen, O.E., Jr. Publication_Date: 1969 Title: Geologic map of the Spreckels 7.5-minute quadrangle, unpublished Publication_Information: Publisher: California Division of Mines and Geology Source_Scale_Denominator: 24000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1969 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Bowen, 1969 Source_Contribution: Source map for geology Source_Information: Source_Citation: Citation_Information: Originator: Dibblee, T.W., Jr. Publication_Date: 1973 Title: Geologic map of the Salinas 15-minute quadrangle, Monterey County, California Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 74-1021 Source_Scale_Denominator: 62500 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1973 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Dibblee, 1973 Source_Contribution: Source map for geology Process_Step: Process_Description: The databases in this report were compiled in ARC/INFO, a commercial Geographic Information System (Environmental Systems Research Institute, Redlands, California), with version 3.0 of the menu interface ALACARTE (Fitzgibbon and Wentworth, 1991, Fitzgibbon, 1991, Wentworth and Fitzgibbon, 1991). The files are in either GRID (ARC/INFO raster data) format or COVERAGE (ARC/INFO vector data) format. Coverages are stored in uncompressed ARC export format (ARC/INFO version 7.x). ARC/INFO export files (files with the .e00 extension) can be converted into ARC/INFO coverages in ARC/INFO (see below) and can be read by some other Geographic Information Systems, such as MapInfo via ArcLink and ESRI's ArcView (version 1.0 for Windows 3.1 to 3.11 is available for free from ESRI's web site: http://www.esri.com). The digital compilation was done in version 7.1.1 of ARC/INFO with version 3.0 of the menu interface ALACARTE (Fitzgibbon and Wentworth, 1991, Fitzgibbon, 1991, Wentworth and Fitzgibbon, 1991). The geologic map information was digitized from a stable original of the geologic map at 1:24,000 scale. The author manuscript (pen on mylar) was scanned using a Altek monochrome scanner with a resolution of 800 dots per inch. The scanned image was vectorized and transformed from scanner coordinates to projection coordinates with digital tics placed by hand at quadrangle corners. The scanned lines were edited interactively by hand using ALACARTE, color boundaries were tagged as appropriate, and scanning artifacts visible at 1:24,000 were removed. Process_Date: 1999 Process_Step: Process_Description: Creation of original metadata record Process_Date: 20010130 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Graymer, Russell W Contact_Organization: USGS-GEO-WRG-NGM Contact_Address: Address_Type: mailing and physical address Address: Mail Stop 975, USGS 345 Middlefield Road City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: US Contact_Voice_Telephone: 650-329-4988 Contact_Electronic_Mail_Address: rgraymer@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 375 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 1105 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 376 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 10 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -123 Latitude_of_Projection_Origin: 0.0 False_Easting: 500000 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 1.0 Ordinate_Resolution: 1.0 Planar_Distance_Units: METERS Geodetic_Model: Horizontal_Datum_Name: Unknown Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: SK-GEOL.PAT Entity_Type_Definition: polygon attribute table Entity_Type_Definition_Source: ARC/INFO Attribute: Attribute_Label: PTYPE Attribute_Definition: Labels of geologic units and areas of water. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qaf Enumerated_Domain_Value_Definition: Artificial fill Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qb Enumerated_Domain_Value_Definition: Basin deposits Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qal Enumerated_Domain_Value_Definition: Alluvial deposits, undivided Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qyf Enumerated_Domain_Value_Definition: Younger flood-plain deposits Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qof Enumerated_Domain_Value_Definition: Older flood-plain deposits Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qc Enumerated_Domain_Value_Definition: Colluvium Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qcf Enumerated_Domain_Value_Definition: Abandoned channel fill deposits Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qls Enumerated_Domain_Value_Definition: Landslide deposits Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qt Enumerated_Domain_Value_Definition: Terrace deposits, undivided Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qoe Enumerated_Domain_Value_Definition: Older eolian deposits Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qch Enumerated_Domain_Value_Definition: Alluvial fan deposits of Chualar Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qp Enumerated_Domain_Value_Definition: Alluvial fan deposits of Placentia Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Qgl Enumerated_Domain_Value_Definition: Alluvial fan deposits of Gloria Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: QTc Enumerated_Domain_Value_Definition: Continental deposits, undivided Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tsm Enumerated_Domain_Value_Definition: Santa Margarita Sandstone Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tmd Enumerated_Domain_Value_Definition: Monterey Formation, diatomite Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tm Enumerated_Domain_Value_Definition: Monterey Formation, porcelinite Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tus Enumerated_Domain_Value_Definition: Unnamed sandstone Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tuss Enumerated_Domain_Value_Definition: Unnamed sandstone, undifferentiated Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Tuc Enumerated_Domain_Value_Definition: Unnamed conglomerate Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Kgd Enumerated_Domain_Value_Definition: Granodiorite of Cachagua of Ross Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Kqm Enumerated_Domain_Value_Definition: Garnetiferous quartz monzonite of Pine Canyon of Ross Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Khqd Enumerated_Domain_Value_Definition: Hornblende-biotite quartz diorite and diorite of Corral de Tierra Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: msc Enumerated_Domain_Value_Definition: Schist of the Sierra de Salinas of Ross Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ms Enumerated_Domain_Value_Definition: Quartzofeldspathic rocks Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ml Enumerated_Domain_Value_Definition: Marble Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: water Enumerated_Domain_Value_Definition: water Detailed_Description: Entity_Type: Entity_Type_Label: SK-GEOL.AAT Entity_Type_Definition: arc attribute table Entity_Type_Definition_Source: ARC/INFO Attribute: Attribute_Label: LTYPE Attribute_Definition: The type of lines used in the geology layer. Includes all faults, as well as lines bounding polygons that define geologic units. Attribute_Definition_Source: author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, certain Enumerated_Domain_Value_Definition: Boundary between two mapped units that retains the original depositional or intrusive relationship (i.e. not faulted). The contact has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, approx. located Enumerated_Domain_Value_Definition: Boundary between two mapped units that retains the original depositional or intrusive relationship (i.e. not faulted). The contact has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 1.25 mm at map scale (1:24,000) or within about 30 meters on the ground. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, inferred, queried Enumerated_Domain_Value_Definition: Boundary between two mapped units that retains the original depositional or intrusive relationship (i.e. not faulted). The contact has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 1.25 mm at map scale (1:24,000) or within about 30 meters on the ground. The existence of the contact is inferred from structural and stratigraphic relationships observed elsewhere. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, sed_terrace, approx. located Enumerated_Domain_Value_Definition: Inner edge of a terrace deposit at the break in slope on the landward side of either a coastal terrace (shoreline angle) or a stream terrace. The contact has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 1.25 mm at map scale (1:24,000) or within about 30 meters on the ground. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, sed_terrace, certain Enumerated_Domain_Value_Definition: Inner edge of a terrace deposit at the break in slope on the landward side of either a coastal terrace (shoreline angle) or a stream terrace. The contact has been observed or is closely constrained, so it is well-located as described in Positional_Accuracy. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fault, approx. located Enumerated_Domain_Value_Definition: Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 1.25 mm at map scale (1:24,000) or within about 30 meters on the ground. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fault, certain Enumerated_Domain_Value_Definition: Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault has been observed or is closely constrained, so it is well-located as described in positional_Accuracy. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fault, concealed Enumerated_Domain_Value_Definition: Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2.5 mm at map scale (1:24,000) or within about 60 meters on the ground. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fault, concealed, queried Enumerated_Domain_Value_Definition: Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the fault. The fault is obscured by overlying mapped units, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2.5 mm at map scale (1:24,000) or within about 60 meters on the ground. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: map boundary, Enumerated_Domain_Value_Definition: Edge of the mapped area. Used primarily to bound polygons at the edge of the map database. The location of the boundary is well located as described in Positional_Accuracy. Detailed_Description: Entity_Type: Entity_Type_Label: SK-STRC.PAT Entity_Type_Definition: Attribute table of SK-STRC. Attribute: Attribute_Label: PTTYPE Attribute_Definition: The type of planar feature which was observed and the orientation of which was measured at this point. Attribute_Definition_Source: author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ash bedding Enumerated_Domain_Value_Definition: Ash bed too thin to appear on map. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: bedding Enumerated_Domain_Value_Definition: Originally horizontal sedimentary layers were observed at this point. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: flat bedding Enumerated_Domain_Value_Definition: Sedimentary layers that retain their original horizontal position were observed at this point. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: foliation Enumerated_Domain_Value_Definition: Metamorphic foliation was observed at this point. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ot bedding Enumerated_Domain_Value_Definition: Originally horizontal sedimentary layers were observed at this point. Evidence that the beds are overturned was observed, although that observation may not have been made at this point. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: vert bedding Enumerated_Domain_Value_Definition: Originally horizontal sedimentary layers were observed at this point. These layers are now vertical. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: vert foliation Enumerated_Domain_Value_Definition: Vertical metamorphic foliation was observed at this point. Attribute: Attribute_Label: DIP Attribute_Definition: The inclination of planar structures measured in degrees down from horizontal. Attribute_Definition_Source: author Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 90 Attribute_Units_of_Measure: degrees Attribute_Measurement_Resolution: 1 Attribute: Attribute_Label: STRIKE Attribute_Definition: The orientation of a horizontal line in an inclined planar structure measured in degrees clockwise from north. Attribute_Definition_Source: author Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 359 Attribute_Units_of_Measure: degrees Attribute_Measurement_Resolution: 1 Detailed_Description: Entity_Type: Entity_Type_Label: SK-STRC.AAT Entity_Type_Definition: Attribute table of SK-STRC. Attribute: Attribute_Label: LTYPE Attribute_Definition: The type of fold axis or other structural linear feature that does not bound geologic units. Faults are described in a separate coverage, but some contacts are described in this coverage. Attribute_Definition_Source: author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, certain Enumerated_Domain_Value_Definition: Boundary between two mapped units that retains the original depositional or intrusive relationship (i.e. not faulted). The contact has been observed, so it is well-located as described in Positional_Accuracy. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: f.a., anticline, certain Enumerated_Domain_Value_Definition: The surface trace of the axis of an anticline. The axis is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2.5 mm at map scale (1:24,000) or within about 60 meters on the ground. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: f.a., anticline, concealed Enumerated_Domain_Value_Definition: The surface trace of the axis of an anticline. The axis is obscured by overlying mapped units, so it is not well- located as described in Positional_Accuracy, but the location is constrained to be within about 2.5 mm at map scale (1:24,000) or within about 60 meters on the ground. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: f.a., anticline, approx. located Enumerated_Domain_Value_Definition: The surface trace of the axis of an anticline. The axis has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 3.75 mm at map scale (1:24, 000) or within about 90 meters on the ground. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: f.a., syncline, certain Enumerated_Domain_Value_Definition: The surface trace of the axis of a syncline. The axis is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 2.5 mm at map scale (1:24,000) or within about 60 meters on the ground. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: f.a., syncline, concealed Enumerated_Domain_Value_Definition: The surface trace of the axis of a syncline. The axis is obscured by overlying mapped units, so it is not well- located as described in Positional_Accuracy, but the location is constrained to be within about 2.5 mm at map scale (1:24,000) or within about 60 meters on the ground. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: f.a., syncline, approx. located Enumerated_Domain_Value_Definition: The surface trace of the axis of a syncline. The axis has not been observed, so it is not well-located as described in Positional_Accuracy, but the location is constrained to be within about 3.75 mm at map scale (1:24,000) or within about 90 meters on the ground. Attribute: Attribute_Label: PLUNGE Attribute_Definition: Database item added in order to plot plunge arrows on plunging fold axes. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: arrowhead Enumerated_Domain_Value_Definition: The plunging end of a fold axis. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 0 Enumerated_Domain_Value_Definition: Not a plunging fold axis. Detailed_Description: Entity_Type: Entity_Type_Label: SK-LNDS.PAT Entity_Type_Definition: Attribute table of SK-LNDS. Attribute: Attribute_Label: PTTYPE Attribute_Definition: Feature observed at this point Attribute_Definition_Source: author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: oil well Enumerated_Domain_Value_Definition: Dry hole drilled for hydrocarbon exploration Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: spring Enumerated_Domain_Value_Definition: Spring Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: water well Enumerated_Domain_Value_Definition: Water well Overview_Description: Entity_and_Attribute_Overview: The databases in this report were compiled in ARC/INFO, a commercial Geographic Information System (Environmental Systems Research Institute, Redlands, California). Almost all the attributes in the various attribute tables of the coverages included in the report are set or calculated by Arc/Info. The exceptions are "coveragename"-ID, LTYPE, PTYPE, PTTYPE, STRIKE, and DIP. "coveragename"-ID is required by internal policy to be sequential. This ensures the highest compatibility of our databases with other GISs. Therefore "coveragename"-ID is calculated equal to "coveragename"#, which is a unique, sequential integer assigned by Arc/Info to each data record. LTYPE, PTYPE, and PTTYPE are author added items to the coverage AAT or PAT that are used to describe the type of line (LTYPE), area (PTYPE), or point (PTTYPE) being recorded. All coverages with AAT and PAT present include these items in the data structure, although in some cases these items are not used. Each has WIDTH 35, OUTPUT 35, TYPE C. STRIKE and DIP are author added items to the coverage PAT that record information about the orientation of planar geologic structures. Both have WIDTH 3, OUTPUT 3, TYPE I. These items are only recorded in the table SK-STRC.PAT Entity_and_Attribute_Detail_Citation: This report, skmf.txt, skmf.pdf, or skmf.ps Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Information Services Contact_Address: Address_Type: mailing address Address: Box 25248, Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80255-0286 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Contact_Facsimile_Telephone: 1-303-202-4693 Resource_Description: USGS MF-2349 Distribution_Liability: Commercial entities named in the texts of this report are cited for descriptive purposes, not to constitute an endorsement of those products. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE Format_Version_Number: 7.x File_Decompression_Technique: gzip -d and tar Transfer_Size: 0.5 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/mf/2001/2349/mf2349c.t.gz Fees: none Metadata_Reference_Information: Metadata_Date: 20160205 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Peter N Schweitzer Contact_Organization: USGS Midwest Area Contact_Position: Collection manager, USGS Geoscience Data Clearinghouse, http://geo-nsdi.er.usgs.gov/ Contact_Address: Address_Type: mailing address Address: Mail Stop 954 12201 Sunrise Valley Dr City: Reston State_or_Province: VA Postal_Code: 20192-0002 Country: USA Contact_Voice_Telephone: 703-648-6533 Contact_Facsimile_Telephone: 703-648-6252 Contact_Electronic_Mail_Address: pschweitzer@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Extensions: Online_Linkage: http://geology.usgs.gov/tools/metadata/tools/ext/parts.ext