Originator: R.W. Graymer
Originator: E.E. Brabb
Originator: D.L. Jones
Geology of the Cordelia and the northern part of the Benicia 7.5 minute quadrangles, California: A digital map database
Series_Name: U.S. Geological Survey Open-File Report
This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits in the mapped area.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 (cdbegeo.txt or cdbegeo.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.
To provide current information on the geologic structure and stratigraphy of a geologic map of the Cordelia and the northern part of the Benicia 7.5' quadrangles, California.
ARC/INFO export file Description of coverage
cd_sp-py.e00 Faults, depositional contacts, and rock units in the Cordelia 7.5 minute quadrangle
cd_sp-sr.e00 Strike and dip information and fold axes in the Cordelia 7.5 minute quadrangle
be_sp-py.e00 Faults, depositional contacts, and rock units in the northern part of the Benicia 7.5 minute quadrangle
be_sp-sr.e00 Strike and dip information and fold axes in the northern part of the Benicia 7.5 minute quadrangle
cd_sp-flt.e00 Index map of faults in the Cordelia 7.5 minute quadrangle with annotation showing the names of major faults
be_sp-flt.e00 Index map of faults in the northern part of the Benicia 7.5 minute quadrangle with annotation showing the names of major faults
cdbe_corr.e00 Correlation table for the units in this map database. This database is not geospatial
cdbe_so.e00 Sources of data index map for this map database. Arcs only.
cdbe_as.e00 Index map of Assemblages in the Cordelia and the northern part of the Benicia 7.5 minute quadrangles.
cdxs_sp-ln.e00 Map showing location of cross-sections. Arcs only.
cdxsa.e00 Cross-section A. This database is not geospatial.
cdxsb.e00 Cross-section B. This database is not geospatial.
Other files Description
cdbegeo.ps A PostScript plot file of a report containing detailed unit descriptions and geological information, plus sources of data and references cited.
cdbegeo.pdf A PDF version of cdbegeo.ps
cdbegeo.txt A text-only file containing an unformatted version of cdbegeo.ps
cdbedb.ps A PostScript plot file containing information on the database files.
cdbedb.pdf A PDF version of cdbedb.ps.
cdbedb.txt A text-only file containing an unformatted version of cdbedb.ps
import.aml ASCII text file in ARC Macro Language to convert ARC export files to ARC coverages in ARC/INFO.
cdbekey.txt Together, these three ASCII text files contain the information given in the description of map units and symbols on the map sheet (cdbemap.ps or cdbemap.pdf)
cdbeso.txt ASCII text file containig information about sources of data as shown in the sources of data index map (cdbe_so) described above.
Currentness_Reference: Date given is publication date of the digital map database
Maintenance_and_Update_Frequency: None planned
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: geologic maps
Theme_Keyword: bedrock geologic units
Theme_Keyword: surficial geologic units
Theme_Keyword: geologic structure
Theme_Keyword: geospatial datasets
Theme_Keyword_Thesaurus: National Geologic Map Database Catalog themes, augmented
Theme_Keyword: 3400 - Graphical
Theme_Keyword: 3410 - PDF
Theme_Keyword: 3100 - Vector
Theme_Keyword: 3110 - ESRI
Theme_Keyword: 3112 - export
Theme_Keyword: 1100 - Geology
Theme_Keyword: 1101 - General
Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4
Place_Keyword: f06095 = Solano
Contact_Person: R.W. Graymer
Contact_Organization: US Geological Survey
Address: 1345 Middlefield Rd., MS 975
City: Menlo Park
We are grateful to the following U.S. Geological Survey paleontologists who have examined our fossils and provided ages necessary to establish the stratigraphic sequence and structure: David Bukry (Cretaceous and Tertiary nannoplankton), Kristin McDougall (Tertiary foraminifers), William Sliter (deceased - Cretaceous and Eocene foraminifers), John Barron (Tertiary diatoms), Charles Powell II (Tertiary mollusks), and Bonita Murchey (Mesozoic radiolaria).
We are also very grateful to managers and staff of Chevron, EXXON, UNOCAL, ARCO, and Shell Petroleum Companies who have provided reports, maps, picked slides, and residues for about 25,000 microfossil localities in the San Francisco Bay Region.
Carl Wentworth kindly provided advice on digitizing and editing procedures. Ed Helley provided materials and advice on Quaternary units.
The digital compilation was done in version 7.0.4 of ARC/INFO with version 3.0 of the menu interface ALACARTE (Fitzgibbon and Wentworth, 1991, Fitzgibbon, 1991, Wentworth and Fitzgibbon, 1991).