This summer experience of collaborative research with a faculty member was made possible by means of funding from the Dean of the College office, the Allegheny College Center for Experiential Learning, and the Edward and Helen Shanbrom Fund. Special thanks are due to Susan Vuke (geologist with the Montana Bureau of Mines and Geology) for her support and hospitality, Sam Reese (Geology Department Technician), and Bob Schwartz (my research advisor) for their support and guidance in field work, subsequent laboratory work, and computer procedures. Many thanks to all of the above.