Mine detail: Thomforde Pits

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Location: Goodhue County, Minnesota, United States, North America
Lat / long: 44.39417, -92.58019
dep_id: 10072951
mrds_id: W018686
Commodity type: nonmetallic
Major mineral: Clay
Operation type: Unknown
Production size: Small ammount of material produced
Development status: Past Producer
ore: Clay
orebody_fm: IRREGULAR, LENSES, PODS
ore_ctrl: Clay-Size Deposition Probably From Local Stagnant Pools In A Flood Plain. Interbedding Caused By Shifting Stream Channels.
Reporter: Sutphin, David M., Mason Jr., G.T.
hrock_unit: Glacial Drift, Loess, And Outwash Sands;Windrow Formation, Ferruginous And Clastic Members;Oneota Formation, Dolomite Sand;Jordan Sandstone
hrock_type: Clastic Sedimentary Rock
Structure: Cretaceous Sediments Flank North Trending, Gently Dipping Red Wing-Rochester Anticline
disc_yr: 1875
References:
  • Deposit:: AUSTIN, G.S., 1963, GEOLOGY OF CLAY DEPOSITS; RED WING AREA, GOODHUE AND WABASHA COUNTIES, MN, MINNESOTA GEOLOGICAL SURVEY R.I. 2.
  • Deposit:: GROUT, F.F., AND SOPER, E.K., 1919, CLAYS AND SHALES OF MINNESOTA; U.S. GEOLOGICAL SURVEY BULL.678.
  • Deposit:: 1919 COMPILA GROUT, F.F., AND SOPER, E.K., BULLETIN 67
  • Production:: SEE AUSTIN, 1963, M.G.S.R.I. 2 FOR SEDIMENT SIZING
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