Sandstones of the Wisconsin Coast of Lake Superior Bedrock Geology Precambrian Bedrock Topography Data and Resources B025 Sandstones of the Wisconsin Coast of Lake Superior Thwaites, F.T.; 1912 Report: 117 p. Download B025-map01 Geological Map of Part of West End of Lake Superior Thwaites, F.T.; 1912 Map: Scale 1 in = 3 miles Download Related Collections Bulletin View Bulletin