You searched for: Author Beikman, Helen M. Remove constraint Author: Beikman, Helen M. Subject Impact craters Remove constraint Subject: Impact craters Institution Stanford Remove constraint Institution: Stanford Place Nebraska Remove constraint Place: Nebraska Place Iowa Remove constraint Place: Iowa Place Kansas Remove constraint Place: Kansas Place Florida Remove constraint Place: Florida Data type Line Remove constraint Data type: Line
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.).