Could the professor be describing: "A Tapestry of Time and Terrain:
 The Union of Two Maps - Geology and Topography."  It is a very popular
display map with both Geographers and Geologists.  It is up on the USGS
site at:   http://tapestry.usgs.gov/

John Sutherland
University of Georgia
[log in to unmask]

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On Thu, 8 Feb 2001 17:08:55 -0700 Elisabeth Filar
<[log in to unmask]> wrote:
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>
> I have a professor that has asked me about an online map of the USA on the
> USGS site. It showed the topographic features map and switched to a geologic
> features map. Any one know what I am talking about? You know how hard it is
> to find something on the USGS site, I was hoping to find someone that could
> point me to the right direction.
>
> Thanks in advance!
> Beth
>
> ~.~.~.~.~.~.~.~.~.~.~.~.~.~.~
> Elisabeth Filar * Map Librarian
> University of Colorado at Boulder
> phone: 303-735-4917 * fax:303-735-4879
> http://www-libraries.colorado.edu/ps/map/frontpage.htm
> ~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~
>