You searched for: Author Beikman, Helen M. Remove constraint Author: Beikman, Helen M. Author Schruben, Paul G. Remove constraint Author: Schruben, Paul G. Author Bawiec, Walter J. Remove constraint Author: Bawiec, Walter J. Subject Impact craters Remove constraint Subject: Impact craters Subject Calderas Remove constraint Subject: Calderas Place Massachusetts Remove constraint Place: Massachusetts Place United States Remove constraint Place: United States Place Georgia Remove constraint Place: Georgia Place Alabama Remove constraint Place: Alabama Place Florida Remove constraint Place: Florida Place Delaware Remove constraint Place: Delaware Format Shapefile Remove constraint Format: Shapefile
1. Outlines of Major Calderas and Impact Structures: Generalized Geologic Map of the Conterminous United States, 2005
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. A caldera is a large, generally circular depre... Geological Survey (U.S.).