You searched for: Author Beikman, Helen M. Remove constraint Author: Beikman, Helen M. Publisher Geological Survey (U.S.) Remove constraint Publisher: Geological Survey (U.S.) Subject Impact craters Remove constraint Subject: Impact craters Place Massachusetts Remove constraint Place: Massachusetts Place United States Remove constraint Place: United States Place Georgia Remove constraint Place: Georgia Place Colorado Remove constraint Place: Colorado Data type Line Remove constraint Data type: Line 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.).