Geologic Map of Mount St. Helens, Washington Prior to the 1980 Eruption
Open-File Report
2002-468
By: Clifford A. Hopson
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Abstract
It is rare that a geologic map exists for a volcano prior to such a catastrophic modification as that produced by the eruption of Mount St. Helens in 1980. As such, this map provides an important historical record of the volcano prior to that eruption. The map has not been reviewed or checked for conformity to USGS editorial standards or stratigraphic nomenclature, and it has not been digitized. This version of the map is unchanged from that submitted to the USGS for publication shortly after the 1980 eruption of Mount St. Helens and includes unresolved inconsistencies with the subsequently published work of Crandell (1987) and Mullineaux (1996). Nevertheless, it is the most accurate available depiction of the pre-1980 edifice and is published here for comparison with more recent geologic mapping and historical perspectives.
Suggested Citation
Hopson, C., 2008, Geologic map of Mount St. Helens, Washington prior to the 1980 eruption (Version 1.0): U.S. Geological Survey Open-File Report 2002-468, 2 Map Sheets: 34 x 44 inches, https://doi.org/10.3133/ofr2002468.
ISSN: 2331-1258 (online)
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Geologic map of Mount St. Helens, Washington prior to the 1980 eruption |
| Series title | Open-File Report |
| Series number | 2002-468 |
| DOI | 10.3133/ofr2002468 |
| Edition | Version 1.0 |
| Year Published | 2008 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Contributing office(s) | U.S. Geological Survey, Volcano Hazards Program |
| Description | 2 Map Sheets: 34 x 44 inches |
| Projection | Polyconic |
| Scale | 31250 |
| Online Only (Y/N) | Y |
| Additional Online Files (Y/N) | Y |