Morrison, Ralston Creek, and Entrada (or Exeter) Fms

Morrison, Ralston Creek, and Entrada (or Exeter) Fms
State Colorado
Name Morrison, Ralston Creek, and Entrada (or Exeter) Fms
Geologic age Jurassic
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone
Sedimentary > Clastic > Mudstone > Claystone
Sedimentary > Clastic > Sandstone
References

Tweto, Ogden, 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000.

NGMDB product
Counties Baca - Bent - Huerfano - Las Animas - Otero - Prowers - Pueblo