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Rock Formations

Measure

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Topo

Ecoregions

Public Lands

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BASEMAPS

Default Weather

Temperature

Smoke

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WEATHER

Pierre Shale (NEKp;0)

Geologic Formation in NE, SD, WY, CO

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Lithology

Geologic Age

Late Cretaceous (100.5 Ma – 66 Ma ago)

Geologic Unit Label

Kp

Mostly medium to dark-gray, brownish-gray, and black, fissle clay shale. Locally grades to thin beds of calcareous, silty shale or claystone, marl, shaly sandstone, and sandy shale. Locally contains thin seams of gypsum and sparse selenite crystals. Approx. max thickness 1970 ft.

— USGS

Colubrid Snake Fossil Colubridae (family)

14 Observations

Frog Fossil Anura (order), “Frog Order”

Pond Turtle Fossil Emydidae (family)

Viper Fossil Viperidae (family), “The Viper Family”

Taxonomy

Geographic Places

Geological Feature

Geologic Formation

Classified As

Geologic Formation

Pierre Shale (NEKp;0)

Pierre Shale (NEKp;0)

Pierre Shale (NEKp;0)