Cite
Citation copied to clipboard
King, Philip B.. Arndt, Raymond E.. Schruben, Paul G.. Bawiec, Walter J.. Beikman, Helen M.. (2005). Geologic Units (Polygons): Geology of the Conterminous United States, 2005. [Shapefile]. Geological Survey (U.S.). https://purl.stanford.edu/hv829rm6225