You searched for: Author Beikman, Helen M. Remove constraint Author: Beikman, Helen M. Place United States Remove constraint Place: United States Place Florida Remove constraint Place: Florida Place Kentucky Remove constraint Place: Kentucky
4. Generalized Glacial Limit Lines with Line Decorations: Geology of the Conterminous United States, 2005
2005. King, Philip B., Arndt, Raymond E., Schruben, Paul G., Bawiec, Walter J., and Beikman, Helen M. This point shapefile shows the locations of impact structures in the United States. An impact structure is a crater formed by the impact of a meteo... Geological Survey (U.S.).
8. Outlines of Major Calderas and Impact Structures: Generalized Geologic Map of the Conterminous United States, 2005
1994. King, Philip B., Arndt, Raymond E., Schruben, Paul G., Bawiec, Walter J., and Beikman, Helen M. This line shapefile represents the major fault lines in the United States. A fault is a fracture or fracture zone in the Earth's crust along which ... Geological Survey (U.S.).