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Morrison Fm and Junction Creek Sandstone

In Gunnison River area east of wedgeout of all units of Wanakah Fm (Jmw) except the Junction Creek Member
State Colorado
Name Morrison Fm and Junction Creek Sandstone
Geologic age Phanerozoic | Mesozoic | Jurassic
Primary rock type mudstone
Secondary rock type sandstone
Other rock types
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Claystone
Sedimentary > Clastic > Mudstone
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 Gunnison - Saguache