Field Trip Guidebook for Cambrian-Ordovician Geology of Western Wisconsin With special papers: Lithologic Cycles in Lower Paleozoic Rocks of Western Wisconsin, M.E. Ostrom; and Lithostratigraphy of the Prairie du Chien Group, R.A. Davis, Jr. Bedrock Geology Data and Resources IC11 Field Trip Guidebook for Cambrian-Ordovician Geology of Western Wisconsin Ostrom, M.E.; Davis, R.A., Jr.; 1970 Report: 131 p. Download Related Collections Information Circular View Information Circular