Geology of the Conterminous United States at 1:2,500,000 Scale -- A Digital Representation of the 1974 P.B. King and H.M. Beikman Map

Online link https://geo-nsdi.er.usgs.gov/metadata/digital-data/11/metadata.faq.html
Description This CD-ROM contains a digital version of the Geologic Map of the United States, originally published at a scale of 1:2,500,000 (King and Beikman, 1974b). It excludes Alaska and Hawaii. In addition to the graphical formats, the map key is included in AS
Originators Schruben, Paul G.; Arndt, Raymond E.; Bawiec, Walter J.; King, Philip B.; and Beikman, Helen M.
Publication U.S. Geological Survey Digital Data Series DDS-11

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