Permian to Pennsylvanian sedimentary rocks

Interbedded sandstone, shale, and limestone usually characterized by ledgy outcrops. Orange to reddish sandstone forms cliffs near Sedona. This unit includes Supai Group and Hermit Shale in northern Arizona and Naco Group in southern Arizona. It was deposited in coastal-plain to shallow-marine settings during time of variable and changing sea level. Rocks of this map unit in southern Arizona may be in part equivalent to Permian rocks of map unit P in central and northern Arizona. (280-310 Ma)
State Arizona
Name Permian to Pennsylvanian sedimentary rocks
Geologic age Pennsylvanian to Permian
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale (Bed)
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Carbonate > Limestone (Bed)
Stratigraphic units Hermit Formation, Supai Group, Schnebly Hill Formation, Naco Group
References

Richard, S.M., Reynolds, S.J., Spencer, J.E., and Pearthree, P.A., 2000, Geologic Map of Arizona: Arizona Geological Survey Map 35, 1 sheet, scale 1:1,000,000.

Blakey, R.C., and & Knepp, R., 1989, Pennsyvanian and Permian geology of Arizona, in Jenney, J.P., and Reynolds, S.J., editors, Geologic evolution of Arizona: Arizona Geological Society Digest 17, p. 313-347.

NGMDB product
Counties Apache - Cochise - Coconino - Gila - Graham - Greenlee - Mohave - Navajo - Pima - Pinal - Santa Cruz - Yavapai