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Madison Limestone

Upper part includes equivalents of Upper Mississippian Doughnut and Humbug Fms (shale, limestone, and sandstone)
State Colorado
Name Madison Limestone
Geologic age Phanerozoic | Paleozoic | Carboniferous Mississippian
Primary rock type limestone
Secondary rock type shale
Other rock types sandstone
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone
Minor
Sedimentary > Clastic > Mudstone > Shale
Sedimentary > Clastic > Sandstone
Map references
Tweto, Ogden 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000.
Unit references
Tweto, Ogden 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000.
Counties Moffat