Geologic Map of Mount St. Helens, Washington Prior to the 1980 Eruption

Open-File Report 2002-468



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.

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
Google Analytic Metrics Metrics page
Additional publication details