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Morrison Fm and Junction Creek Sandstone

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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