Author: Cohee, George Vincent, 1907- / Subject: Silurian Geologic Period - Yale University Library GeoBlacklight Search Results

Start Over Author Cohee, George Vincent, 1907- Subject Silurian Geologic Period

1. Thickness and lithology of Upper Ordovician and Lower and Middle Silurian rocks in the Michigan Basin

1948. 2018-01-30T14:30:37Z. 2018-01-30T14:30:37Z. Cohee, George Vincent, 1907-. U.S. Geological Survey. English. cartographic image. Public. Michigan Basin (Mich. and Ont.), North America, and Michigan Basin. Ordovician, Silurian, and From 405 to 500 million years ago.