Geology of the Duluth Gabbro Complex near Duluth, Minnesota, Bulletin 44, Plate 1
Description
Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of Duluth and vicinity, St. Louis County, Minnesota, scale 1:24,000.
Taylor, Richard B. (1964). Geology of the Duluth Gabbro Complex near Duluth, Minnesota, Bulletin 44, Plate 1. Minnesota Geological Survey. https://reflections.mndigital.org/catalog/mgs:1122 (map)