PSIRFD_F_4
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Figure 4. Stratagraphic chart of Raton basin, Pike and San Isabel National Forests Study Area
(Higley, 2005).
Era Period Epoch Rock Unit
Pleistocene
Quaternary Ogallala Formation
Pliocene
Neogene Miocene Devil's Hole Formation
Cenozoic Oligocene Farasita Formation
Huerfano Formation
Eocene
Paleogene Cuchara Formation
Poison Canyon Formation
Paleocene
Raton Formation
Vermejo Formation
Trinidad Sandstone
Pierre Shale
Smoky Hill Marl
Upper Niobrara Formation
Cretaceous Fort Hays Limestone
Codell Sandstone
Mesozoic
Carlile Shale
Benton Shale
Greenhorn Limestone
Graneros Shale
Lower Dakota Sandstone
hiatus
Jurassic Upper Morrison Formation
Entrada Sandstone
Upper Dockum Group
Triassic
Lower
hiatus
Upper
Bernal Formation
Middle
San Andres Limestone
Permian
Glorieta Sandstone
Yeso Formation
Lower
Sangre de Cristo Formation
Upper
Paleozoic
Pennsylvanian
Magdalena Group
Middle
Lower
hiatus
Upper Tererro Formation
Mississippian
hiatus
Lower
Devonian Espirtu Santo Formation
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