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Chugwater Fm

Red sandstone, siltstone, shale, and local limestone and gypsum
State Colorado
Name Chugwater Fm
Geologic age Phanerozoic | Mesozoic | Triassic
Primary rock type sandstone
Secondary rock type mudstone
Other rock types limestone; evaporite
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone
Sedimentary > Clastic > Siltstone
Sedimentary > Clastic > Mudstone > Shale
Minor
Sedimentary > Carbonate > Limestone
Incidental
Sedimentary > Chemical > Evaporite > Gypsum
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 Grand - Jackson - Routt