You searched for: Author Beikman, Helen M. Remove constraint Author: Beikman, Helen M. Access Public Remove constraint Access: Public Place New Jersey Remove constraint Place: New Jersey Place Colorado Remove constraint Place: Colorado Place Arizona Remove constraint Place: Arizona
4. Generalized Glacial Limit Lines with Line Decorations: Geology of the Conterminous United States, 2005
8. Outlines of Major Calderas and Impact Structures: Generalized Geologic Map of the Conterminous United States, 2005
1994. King, Philip B., Arndt, Raymond E., Schruben, Paul G., Bawiec, Walter J., and Beikman, Helen M. This polygon shapefile shows the boundaries of geologic units within the United States. This layer is part of the Geologic Map of the United States... Geological Survey (U.S.).