You searched for: Author Beikman, Helen M. Remove constraint Author: Beikman, Helen M. Author Arndt, Raymond E. Remove constraint Author: Arndt, Raymond E. Subject Calderas Remove constraint Subject: Calderas Place Nebraska Remove constraint Place: Nebraska Place Iowa Remove constraint Place: Iowa Place Alabama Remove constraint Place: Alabama Place Colorado Remove constraint Place: Colorado 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.).