Abstract
Geologic mapping of the San Rafael Primitive Area (now the San Rafael
Wilderness) by Gower and others (1966) and Vedder and others (1967) did not
include all of the San Rafael Mtn. quadrangle, and the part that was mapped was
done in reconnaissance fashion. To help resolve some of the structural and
stratigraphic ambiguities of the earlier mapping and to complete the mapping of
the quadrangle, additional field work was done during short intervals in 1980
and 1981 and from 1996 to 1998. Contacts within the belt of Franciscan rocks at
the southwestern corner of the quadrangle were generalized from the detailed
map by Wahl (1998).
Because extensive areas were inaccessible owing to impenetrable
chaparral, observations from several helicopter overflights (1965, 1980, 1981) and
interpretations from aerial photographs were used as compilation aids.
Consequently, some of the depicted contacts and faults are highly inferential,
particularly within the Upper Cretaceous rocks throughout the middle part of
the quadrangle.
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First posted October 25, 2001
Readme's and Metadata
Data
Files for viewing and plotting
- Map PS.GZ (11.5 MB)
Full-color geologic map of the San Rafael Mtn. quadrangle at 1:24,000 scale on the topographic base, including a detailed Correlation of Map Units diagram, and an expanded Description of Map Units, in plottable PostScript format. File compressed using gzip.
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