-------- Original Message -------- Subject: SILS Bulletin 08-19 Online Geologic Map of Mount St Helens Prior to 1980 Eruption Date: Tue, 29 Jul 2008 09:39:23 -0600 From: Sheryle J Jackson <[log in to unmask]> To: undisclosed-recipients:; SILS Information Bulletin Number: 08-19 Geologic Map of Mount St. Helens, Washington Prior to the 1980 Eruption Date: July 29, 2008 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. 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 to be used here for comparison with more recent geologic mapping and historical perspectives. The geologic map of Mount St. Helens is available *online only *at */_http://pubs.er.usgs.gov/usgspubs/ofr/ofr2002468_/* David W. Ramsey produced the digital restoration for this map. *_Download sheet 1 as a 34" x 44" PDF file_*. This sheet consists of the geologic map with a topo base (of02-468_sheet1.pdf; 1.9 MB) *_Download sheet 2 as a 34" x 44" PDF file_*. This sheet consists of text, correlation of map units, description of map units, references, and historical note (of02-468_sheet2.pdf; 1.4 MB) For questions about this report, contact _Cliff Hopson_, _Mike Clynne_, or _Dave Ramsey_. This map is a raster scan rather than a vector digital product; there are neither GIS data nor metadata for it. For more information on USGS products contact the USGS Science Information and Library Services (SILS) at 1-888-ASK-USGS, or online through the USGS store at */_http://store.usgs.gov_/**/_._/* */_ _/* Sheryle Girk-Jackson 303 202 4176, FAX 303 202 4633, email: [log in to unmask] Sheryle J. Girk-Jackson Technical Information Specialist/Business Acquisitions USGS/ESIC