Geology of the Minneapolis-St. Paul metropolitan area, Bulletin 27, Plate 1
Description
Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of the Minneapolis-St. Paul Metropolitan District, scale 1:96,000.
Schwartz, George M. (George Melvin), 1892-1980 (1936). Geology of the Minneapolis-St. Paul metropolitan area, Bulletin 27, Plate 1. Minnesota Geological Survey. https://reflections.mndigital.org/catalog/mgs:1101 (map)