Abstract
The well-preserved record of alpine glacial geology displayed in Anderson Canyon, south-central Idaho, is a potential source of diversity and enrichment for summer field programs that visit the Rocky Mountain west each year. This valley provides a record of regional glacial history within a relatively small area (9 square km or 3.5 square miles), and is suitable for a short student mapping project. The moraines and outwash in Anderson Canyon define two major glaciations (the Copper Basin and Potholes) that are generally equivalent to the Bull Lake and Pinedale glaciations of adjacent Rocky Mountain areas. Associated lacustrine deposits document impoundment and drainage of two glacial lakes. Reconstruction of ice margins, fluvial patterns, and lacustrine systems provides a basis for correlation with regional Pleistocene events. The access road to Anderson Canyon is located midway along an improved road that connects Ketchum-Sun Valley on Idaho 75 with U.S. 93, approximately 27.3 km (17 miles) north of Mack...
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