Ronald Blakey, Northern Arizona University, Department of Geology
This web-site is a presentation showing graphically the Proterozoic and Phanerozoic geologic history of the Southwestern United States. There is a text file providing a brief narrative of the geologic history, which links to map graphics for each period. The graphics contain a scale and have labeled features to better understand what is happening as time progresses.
This description of a site outside SERC has not been vetted by SERC staff and may be incomplete or incorrect. If you
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