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Mineral Resources > Online Spatial Data > Geology > by state > Colorado

Fort Union Fm

Shale, sandstone, and local coal beds
StateColorado
NameFort Union Fm
Geologic agePhanerozoic | Cenozoic | Tertiary
Original map labelTf
Primary rock typeshale
Secondary rock typesandstone
Other rock typescoal
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone
Sedimentary > Clastic > Mudstone > Shale
Minor
Sedimentary > Coal (Bed)
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.
Geographic coverageMoffat - Rio Blanco - Routt

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