U.S. DEPARTMENT OF THE INTERIOR
U.S. GEOLOGICAL SURVEY
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Open-File Report 99-50D
This report is preliminary and has not been reviewed
for conformity with the U.S. Geological Survey editorial standards or with
the North American Stratigraphic Code. Any use of trade names is for descriptive
purposes only and does not imply endorsement by the U.S. government.
1999 The entire Open-File Report 99-50-D can be successfully viewed or downloaded (1.3MB), for use with Adobe Acrobat Reader (version 3.0 or later). If you do not already have Acrobat Reader version 3.0 or later, you may download the latest version here. |
1U.
S. Geological Survey, Denver, CO, 80225
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