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From: Fred McDowell <mcdowell@xxxxxxxxxxxxxxx>
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PUBLICATION ANNOUNCEMENT
The Geological Society of America has
just published Digital Map and Chart no. 6,
entitled: Geologic transect across the northern
Sierra Madre Occidental volcanic field, Chihuahua
and Sonora Mexico. The map is a compilation of 11
field projects completed by graduate students of
the University of Texas at Austin. Together the
projects extend across the SMO volcanic field
between 28° and 28° 30' N. The original maps have
been digitized on a 1:250,000 topographic base,
and the original map units have been combined
into a regional set of nine volcanic units. Both
pdf and ARC-GIS versions of the map are
available. When printed at the desired scale of
1:250,000, the map measures 3' by 5', including
an explanation of units and three inset areas
displayed at 1:80,000. Locations are plotted for
223 samples, for which analytical data have been
obtained, including major- and trace-element
geochemistry, geochronology, and limited
radiogenic isotopic data. In addition to the data
collected as part of the original studies,
expanded trace element analyses and results from
high-precision 40Ar-39Ar geochronology are also
included.
Accompanying the map is a text that
briefly describes the history of UT's study of
the SMO volcanic field, the preparation of the
transect map, and the analytical methods
employed. A general summary of the geologic
features, and tables for all of the analytical
results are also included.
This publication can be viewed and
downloaded using the following pathway on GSA's
web site: home page > publication services >
submit a Map and Chart > view our digital map and
chart page. This page also includes other map
postings that may be of interest. A direct link
to this publication is:
http://gsamaps.gsajournals.org/gsamaps/map/10.1130/2007.DMCH006
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