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Topo

Rock Formations

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Topo

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Cratonal Sequence - Continentally derived siltstone and clay (NVJTRch;0)

Geologic Formation in NV

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Lithology

Siltstone

Bentonite

Sandstone

Geologic Age

Late Triassic – Early Jurassic (237 Ma – 175.1 Ma ago)

Geologic Unit Label

JTRch

These continental deposits include variegated bentonitic claystone, siltstone, and clayey sandstone, ledge-forming sandstone, and red siltstone (Stewart and Carlson, 1978). The lower part of this unit is equivalent to the Upper Triassic Chinle Formation and the upper part corresponds to the Moenave and Kayenta Formations which are now considered Lower Jurassic (Stewart, 1980). It crops out in Elko, Lincoln, and Clark Counties.

— USGS

Taxonomy

Classified As

Geologic Formation