Landslides in Alameda County, California, A Digital Database Extracted from Preliminary Photointerpretation Maps of Surficial Deposits by T.H. Nilsen in USGS Open-File Report 75-277

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Description All or part of 25 7.5-minute quadrangles identifying 8465 Landslides largely slow-moving slides and earth flows in Alameda County, California, have been converted to a digital-map database, compiled at 1:24,000 scale and plotted at 1:62,500 scale, that ca
Originators Roberts, Sebastian; Roberts, Michelle A.; Brennan, Eileen M.; and Pike, Richard J.
Publication U.S. Geological Survey Open-File Report 99-0504

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attributes of point symbols

Label Definition
SYMBOL code for symbol used to plot syncline, anticline features


attributes of contour lines

Label Definition
DEPTH depth to Cambrian-PreCambrian unconformity, in thousands feet below sea level
SYMBOL code for symbol used to plot contours