Mineral Resources Program
Western Phosphate Field, U.S.A.: Science in Support of Land Management
The Western Phosphate Field is a 350,000-square-kilometer area
of the northern Rocky Mountains.
Darkened areas represent exposures of the Phosphoria Formation.
U.S. Geological Survey Fact Sheet 100-02
The text of this report is presented here in Portable Document Format. The latest
version of Adobe Acrobat Reader or similar software is required to view it. If
you wish to download the latest version of Acrobat Reader free of charge, click
file (1.29 MB)
(This version of the report is accessible as defined in Section 508.)