The Paleontology of North America

The Devonian in Idaho, US

 map

undifferentiated rock units

See exposures in this state from the:

Quaternary
Tertiary
Cretaceous
Jurassic
Triassic
Permian
Carboniferous
Devonian
Silurian
Ordovician
Cambrian
Precambrian

Devonian Fossils

No slide show is available for the Devonian in Idaho.

Paleontology and geology

Early Devonian rocks are absent, as the state was above sea level during this time and any deposits have eroded away. Later Devonian rocks in Idaho are mostly shallow to moderate-depth marine sediments in the central and southeastern parts of the state, plus a few river deposits in parts of the southeast. Only one rock unit has yielded a variety of well-preserved marine fossils — it includes corals, brachiopods, stromatoporids, crinoids, sponges, gastropods, pelecypods, ostracods, cephalopods, conodonts, and fishes. Scattered river deposits in the northern part of southeastern Idaho have produced fossils of a variety of primitive fishes.

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