You searched for: Author Schruben, Paul G. Remove constraint Author: Schruben, Paul G. Author Beikman, Helen M. Remove constraint Author: Beikman, Helen M. Subject Geoscientific Information Remove constraint Subject: Geoscientific Information Place Massachusetts Remove constraint Place: Massachusetts Place Arkansas Remove constraint Place: Arkansas Place Georgia Remove constraint Place: Georgia Place Florida Remove constraint Place: Florida Place Delaware Remove constraint Place: Delaware Data type Polygon Remove constraint Data type: Polygon
2005. King, Philip B., Arndt, Raymond E., Schruben, Paul G., Bawiec, Walter J., and Beikman, Helen M. This line shapefile shows the outlines of major calderas and impact structures in the United States. This layer is part of the Geologic Map of the ... Geological Survey (U.S.).
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.).