An Introduction to Geologic Maps

by Gary J. Calderone (Glendale Community College), Michelle Hall-Wallace, and Robert F. Butler (University of Arizona)

Acknowledgments & photo credits

All photos and illustrations by Gary Calderone except where noted.

Other photos and illustrations are courtesy of the U.S. Geological Survey (McGregor, J. K., and C. Abston, 1995, Earth Science Photographs from the U. S. Geological Survey Library, USGS Digital Data Series, DDS-21) and web postings; and the National Park Service (via web postings).

 

The project was oriiginally conceived and designed under a National Science Foundation (NSF) educational grant DUE #9552505.

 

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