The Paleontology Portal

The Paleontology of the midwest

Introduction
Time and Space
Fossil Gallery

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The Precambrian in Illinois, US

See exposures in this state from the:

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

Precambrian Fossils

Paleontology and geology

There are no Precambrian rocks exposed at the surface in Illinois. Precambrian rocks in the subsurface are mostly volcanic and granitic intrusions, and thus do not contain fossils.