| 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. |
| Genre: | USGS Numbered Series |
| ProdID: | 50724 |
| Citation Author: | Hopson, Clifford A. |
| Citation Contributing Office: | Geological Survey (U.S.) |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | Version 1.0 |
| Citation Editor: | |
| Citation End Page: | |
| Citation Issue: | |
| Citation Keywords: | |
| Citation Language: | ENGLISH |
| Citation Larger Work Title: | |
| Citation LatN: | 0463000 |
| Citation LatS: | 0460000 |
| Citation LonE: | -1220000 |
| Citation LonW: | -1223000 |
| Citation Month: | |
| Citation No Pagination: | N |
| Citation Number Of Pages: | |
| Citation Online Only Flag: | Y |
| Citation Phsyical Description: | 2 Map Sheets: 34 x 44 inches |
| Citation Projection: | Polyconic |
| Citation Public Comments: | |
| Citation Publisher: | Geological Survey (U.S.) |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 2002-468 |
| Citation Search Results Text: | Geologic Map of Mount St. Helens, Washington Prior to the 1980 Eruption; 2008; OFR; 2002-468; Hopson, Clifford A. |
| Citation Start Page: | |
| Citation Volume: | |
| Citation Year: | 2008 |
| Type: | citation/reference |
| Text: | Geologic Map of Mount St. Helens, Washington Prior to the 1980 Eruption; 2008; OFR; 2002-468; Hopson, Clifford A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| URL (INDEX PAGE): | http://pubs.usgs.gov/of/2002/of02-468/ |
| URL (INDEX PAGE): | http://ngmdb.usgs.gov/Prodesc/proddesc_84084.htm |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | Geological Survey (U.S.) |
