The Silurian in Illinois, US

Silurian in Illinois map

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Silurian Fossils

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Paleontology and geology

Most of the Silurian rocks in northern Illinois are dolostones, but further south, limestones, siltstones, and shale are more common. Illinois was almost continuously underwater in the Silurian, and most of the rocks formed as part of reef complexes. The northern reefs are called the Niagaran reefs and are highly fossiliferous. Corals, bryozoans, stromatoporoids, brachiopods, and crinoids were common members of these reef communities.

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Organizations | Education and Exhibits | Research and Collections


Museums (showing 1 of 1 listings)

Burpee Museum of Natural History: The mission of Burpee Museum of Natural History is to inspire all people to engage in a lifetime of learning about the natural world.

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Education and Exhibits

Virtual Exhibits (showing 1 of 1 listings)

First Families of Chicago: Local geology of the Chicago, Illinois, area, complete with descriptions of the fossils found there.

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Research and Collections

Researchers (showing 1 of 1 listings)

Dr. Thomas W. Kammer: Specialty: Evolutionary paleoecology of Paleozoic crinoids, plus lithostratigraphy, biostratigraphy, and sequence stratigraphy of marine Mississippian rocks in the east-central United States. Field areas include West Virginia, Kentucky, Indiana, Illinois, Missouri, and Iowa.

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