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MAP

Topo

Rock Formations

Measure

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Topo

Ecoregions

Public Lands

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BASEMAPS

Default Weather

Temperature

Smoke

...

WEATHER

Permian to Pennsylvanian sedimentary rocks (AZPPA;0)

Geologic Formation in AZ, NV, UT

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Lithology

Limestone

Shale

Sandstone

Geologic Age

Moscovian – Kungurian (310 Ma – 280 Ma ago)

Geologic Unit Label

PPA

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)

— USGS

Taxonomy

Classified As

Geologic Formation