1. Geologic maps of Greenstone-Granite areas, northern Laramie Mountains, Converse and Natrona counties, Wyoming Yale Public content 1987. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Map Distribution. English. Public. Wyoming, Converse County, and Natrona County.