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The Permian in Wyoming, US

Permian in Wyoming map

undifferentiated rock units help

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Quaternary
Tertiary
Cretaceous
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Permian
Carboniferous
Devonian
Silurian
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Precambrian

Permian Fossils

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Paleontology and geology

Although no rocks of Permian age are shown on this map, exposures of these rocks do occur in a number of outcrops in the Bighorns, Black Hills, and several other mountain ranges throughout the state. These rocks are mainly limestones and shales, with some sandstones — evaporites are also common, recording the retreat of the sea from Wyoming. Fossils include brachiopods, as well as occasional sponges, horn corals, bryozoans, pelecypods, gastropods, belemnites, ostracods, conodonts, and fish.


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