Geologic map and database of the Salem East and Turner 7.5 minute quandrangles, Marion County, Oregon: A digital database

This digital map database, compiled from previously published and
unpublished data, and new mapping by the authors, represents the
general distribution of bedrock and surficial deposits of the Salem
East and Turner 7.5 minute quadrangles. A previously published
adjacent geologic map and database by Tolan, Beeson, and Wheeler
(1999) contains a text file (geol.txt or geol.ps), it provides current
information on the geologic structure and stratigraphy of the area
covered. The database delineates map units that are identified by
general age and lithology following the stratigraphic nomenclature of
the U.S. Geological Survey. The scale of the source maps limits the
spatial resolution (scale) of the database to 1:24,000 or smaller.