National Geologic Map Database
General Information
- Title: Physiographic diagrams of Mount St. Helens, Washington showing changes in its Summit Crater, summer, 1981
- Author(s): Alpha, T.R., Morley, J.M., Myers, Bobbie, and Leighley, Terry
- Publishing Organization: U.S. Geological Survey
- Series and Number: Miscellaneous Field Studies Map MF-1420
- Publication Date: 1982
- Map Scale: 1:12,500
- Cross Section: None
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