Preliminary geologic map of the Calabasas 7.5' quadrangle, southern California: A digital database

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Description This Open-File report is a digital geologic map database. This digital map database is compiled from previously published sources combined with some new mapping and modifications in nomenclature. The geologic map database delineates map units that are
Originators Yerkes, Robert F. and Campbell, Russell H.
Publication U.S. Geological Survey Open-File Report 95-51

Related topics

States or counties


Geologic map units symbols (no full descriptions found)

Label Definition


Linear geologic features

Label Definition
LTYPE Line type


Geologic map units at specific locations (same attributes as polygon coverage CB-GEOL.PAT)

Label Definition


fold axes

Label Definition
LTYPE Line type


Strike and dip information of bedding

Label Definition
PTTYPE Point type
DIP Dip of bedding
STRIKE Strike of bedding


Well localities, supporting data given in Yerkes and Campbell (1993), and Yerkes and Showalter (1990)

Label Definition
QUADRANGLE Quadrangle abbreviated name
MAP_NUMBER point ID used on map
TOWNSHIP Township identification
RANGE_WEST Range west
SECTION Section number
OPERATOR Well operator's name
NAME/NUMBER name/number of well
ELEV. Elevation (ft.)
YEAR year drilled
TD Total depth (ft.)
BOTTOM Bottom-hole geology (No definitions found)


Fossil localities, supporting data given in Yerkes and Campbell (1993)

Label Definition
QUAD Quadrangle abbreviated name
SEC Section number
SOURCE Source of fossil localities information
MAP_NO Point ID used on map (No definitions found)
COLL-NO Collector's number (No definitions found)
T Township
RW Range west
AGE Age of fossil (symbol) (no definitions of symbols found)
UNIT Geologic unit symbol (No definitions found)