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Preliminary quaternary geologic maps of Santa Clara Valley, Santa Clara, Alameda, and San Mateo counties, California: A digital database


Publication Date
Time Period
File Modification Date
2013-05-16 14:07:32


This digital map database, which is compiled from previouslyunpublished and open-filed U.S. Geol. Survey reports (Wesling andHelley, 1989), represents the general distribution and identity ofQuaternary deposits in eight 7.5 minute quadrangles in the southernSan Francisco Bay region, California.


Point of Contact :
Graymer, Russell W
Process Contact :
Jennifer Lenz
Distributor :
USGS Information Services
Metadata Contact :
Peter N Schweitzer
Originator :
E.J. Helley, R.W. Graymer, G.A. Phelps, P.K. Showalter, C.M. Wentworth

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17.4 KB application/fgdc+xml


Together with the accompanying text file (scgeo.txt), this digitalmap database provides current information on the Quaternary geologyof the area covered. The database delineates map units that areidentified by general age and lithology following the compilationsources. One bedrock unit, the Santa Clara formation, isdifferentiated but the other bedrock units are combined and are notidentified. More specific information about the units may beavailable in the original Open-file reports.
Plotfile of digital database in PDF format (3.4MB)
Plotfile of digital database in PDF format (3.4MB)



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Added to Sciencebase on Sat Nov 16 13:52:45 MST 2013 by processing URL <b>metadata.xml</b> in item <a href=""></a> <br />

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