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Page 7073, results 176801 - 176825

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Exploratory drilling in the Prairie du Chien Group of the Wisconsin zinc-lead district by the U.S. Geological Survey in 1949-1950
Allen Van Heyl, Erwin J. Lyons, Allen F. Agnew
1951, Circular 131
The U. S. Geological Survey in cooperation with the Wisconsin Geological and Natural History Survey explored the Prairie du Chien group in the main productive area of the Wisconsin zinc-lead district during 1949-50. Eight properties--Crow Branch diggings, Leix, Harris, Spitzbarth, Kennedy, James, Raisbeck and Vinegar Hill Roaster--were explored using both...
Detroit River group in the Michigan basin
Kenneth K. Landes
1951, Circular 133
This report attempts to correlate the outcropping rocks in the type locality of the Detroit River group with the thick sequence of rocks that has been explored by many drilled wells in the Michigan Basin during the last twenty years. The surface nomenclature as recently revised (Ehlers, 1950) is suggested...