1. Bedrock geologic map of the southern part of the Diorite and Champion 7 1/2-minute quadrangles, Marquette County, Michigan [cartographic material] Yale Public content 1977. 2014-01-27T20:50:26Z. 2014-02-14T23:14:16Z. Cannon, William F. The Survey. English. Public. Michigan, Marquette County, and U.S.