Quaternary geology and liquefaction susceptibility, Napa, California 1:100,000 quadrangle: A digital database

Online link https://geo-nsdi.er.usgs.gov/metadata/open-file/98-460/metadata.faq.html
Description This Open-File report consists of a digital geologic map database and associated digital plot files and text files, revised from a hard copy by Sowers and others (1995). This digital map database provides current information on Quaternary geology and liq
Originators Sowers, Janet M.; Noller, Jay S.; and Lettis, William R.
Publication U.S. Geological Survey Open-File Report 98-460

Related topics

States or counties


Geologic map units

Label Definition
PTYPE Polygon type
LIQ Liquefaction susceptibility


Linear features on geologic map

Label Definition
LTYPE Line type


Surficial deposits at specific points (same attributes as polygon coverage NA-GEOL.PAT)

Label Definition


Historical liquefaction events

Label Definition
PROBABLE_UNIT probable geologic unit of the historical liquefaction event (same as geologic units of polygon coverage NA-GEOL.PAT)
PTTYPE Type of event