You searched for: Author Beikman, Helen M. Remove constraint Author: Beikman, Helen M. Subject Calderas Remove constraint Subject: Calderas Place Massachusetts Remove constraint Place: Massachusetts Place United States Remove constraint Place: United States Format Shapefile Remove constraint Format: Shapefile Year 2005 Remove constraint Year: 2005
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.).