Geologic map and map database of the Oakland metropolitan area, Alameda, Contra Costa, and San Francisco Counties, California

Online link https://geo-nsdi.er.usgs.gov/metadata/map-mf/2342/metadata.faq.html
Description This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits in the mapped area.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 (oakmf.
Originators Graymer, Russell W.
Publication U.S. Geological Survey Miscellaneous Field Studies Map 2342

Related topics

States or counties

Overview of attributes

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, BKTYPE,
SAMPNO, 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.  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 <QUAD>-STRC.PAT.
FAULTNAME is an author added item the coverage AAT that records
information about the names of faults in the map area.  It has
WIDTH 35, OUTPUT 35, TYPE C.  FAULTNAME is only recorded in the
table OAK-FLT.AAT.  Note that this publication includes a separate
coverage for the geologic units and lines and a separate coverage
for the geologic structures in each of the seven quadrangles in the
study area.  The database organization is the same for each, so
they are not described individually.  Instead, a single description
for all seven quadrangles is denoted by the label <QUAD>.  The
actual database item is labeled with a quadrangle identifier code
in place of <QUAD> (ri = Richmond quadrangle, bv = Briones Valley
quadrangle, ow = Oakland West quadrangle, oe = Oakland East
quadrangle, lt = Las Trampas Ridge quadrangle, sl = San Leandro
quadrangle, ha = Hayward quadrangle).  For example, the AAT for the
structure coverage of the Hayward quadrangle is HA-STRC.AAT, and is
described above by <QUAD>-STRC.AAT.  Because of the single entry
above, all of the enumerated domain values for every coverage are
listed, therefore not every domain value will be present in every
coverage.

This report combined with the explanatory pamphlet or pamphlets: oakmf.ps, oakmf.pdf, oakdb.ps and oakgeo.ps, oakdb.pdf and oakgeo.pdf, or oakdb.txt and oakgeo.txt.

<QUAD>-GEOL.PAT

Attribute table of <QUAD>-GEOL.

Label Definition
PTYPE Geologic unit label

<QUAD>-GEOL.AAT

Attribute table of <QUAD>-GEOL.

Label Definition
LTYPE Type of geologic or geographic feature denoted by a line in the database.

<QUAD>-STRC.PAT

Attribute table of <QUAD>-STRC.

Label Definition
PTTYPE The type of planar feature which was observed and the orientation of which was measured at this point.
DIP The inclination of planar structures measured in degrees down from horizontal.
STRIKE The orientation of a horizontal line in an inclined planar structure measured in degrees clockwise from north.

<QUAD>-STRC.AAT

Attribute table of <QUAD>-STRC.

Label Definition
LTYPE The type of fold axis or other structural linear feature that does not bound geologic units. Faults and contacts are described in a separate coverage.

OAK-QUAD.PAT

Attribute table of OAK-QUAD.

Label Definition
PTYPE Name of USGS 7.5' quadrangles within the map area

OAK-QUAD.AAT

Attribute table of OAK-QUAD.

Label Definition
LTYPE Type of line recorded in the quadrangle index coverage.

OAK-FLT.AAT

Attribute table of OAK-FLT.

Label Definition
LTYPE The type of geologic or geographic feature denoted by a line in the database.
FAULTNAME Identity of named faults and strands of named fault zones

OAK-CORR.PAT

Attribute table of OAK-CORR.

Label Definition
PTYPE Labels of geologic units and areas of water.

OAK-CORR.AAT

Attribute table of OAK-CORR.

Label Definition
LTYPE Type of line used in the correlation chart

OAK-SO.PAT

Attribute table of OAK-SO.

Label Definition
PTYPE The index number of the area labeled that relates to the sources of data as shown in the explanation pamphlet (pamf.ps, pamf.pdf, pageo.ps, pageo.pdf, or pageo.txt) or in Lineage: Source_Information above. The major areas mapped as water are also shown.

OAK-SO.AAT

Attribute table of OAK-SO.

Label Definition
LTYPE Type of line used in the Sources of Data Index Map coverage

OAK-AS.PAT

Attribute table of OAK-AS.

Label Definition
PTYPE Stratigraphic assemblage distribution and areas of water. Assemblages are described in the explanatory pamphlet (pamf.ps, pamf.pdf, pageo.ps, pageo.pdf, pageo.txt)

OAK-AS.AAT

Attribute table of OAK-AS.

Label Definition
LTYPE The type of line in the assemblage map.

OAK-TERR.PAT

Attribute table of OAK-TERR.

Label Definition
PTYPE Mesozioc terrane distribution, areas of Quaternary cover, areas of Tertiary strata, and areas of water. Terranes are described in the explanatory pamphlet (pamf.ps, pamf.pdf, pageo.ps, pageo.pdf, pageo.txt)

OAK-TERR.AAT

Attribute table of OAK-TERR.

Label Definition
LTYPE The type of line in the terrane map.

OAK-XSA.PAT

Attribute table of OAK-XSA.

Label Definition
PTYPE Unit label in the cross section.

OAK-XSA.AAT

Attribute table of OAK-XSA.

Label Definition
LTYPE The type of line in the cross section.

OAK-XSB.PAT

Attribute table of OAK-XSB.

Label Definition
PTYPE Unit label in the cross section

OAK-XSB.AAT

Attribute table of OAK-XSB.

Label Definition
LTYPE The type of line in the cross section.