The Paleontology of North America

The Triassic in Montana, US

map

undifferentiated rock units

See exposures in this state from the:
Quaternary
Tertiary
Cretaceous
Jurassic
Triassic
Permian
Carboniferous
Devonian
Silurian
Ordovician
Cambrian
Precambrian

Triassic Fossils

No slide show is available for the Triassic in Montana.

Paleontology and geology

A hot, arid landscape stretched across Montana throughout most of the Triassic. Terrestrial deposits occur only in southern Montana and have yet to yield a single fossil. However, there were two marine transgressions that crossed the state during the Triassic. Fossils from these marine rocks include brachiopods and ammonites.
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