-------- 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