Bureau of Mines / Minerals yearbook 1990
Year 1990, Volume 2 (1990)
Aase, James H.
Minnesota, pp. -281 PDF (1.4 MB)
LEGEND State boundary ———- County boundary 0 CapItal . City ~ — Waterway — Crushed stone/sand & gravel districts MINERAL SYMBOLS Clay Clay cs Crushed Stone D-O Dimension GranIte D-L Dimension Limestone F. Iron u!!! Umeplant Pest Pest so Sand and Gravel (~ ~1 Concentration of ~. .-, mineral operations Principal Mineral.Producing LocalitiesMINNESOTA
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