home   Printer friendly version Add to site
Advanced search
Time & Space Fossil Gallery Famous Flora & Fauna
Careers Resources K-12 Collections PaleoPeople

The Ordovician in Illinois, US

Ordovician in Illinois map

undifferentiated rock units help

Choose a time period:


Ordovician Fossils
Fossil photos from Ordovician in Illinois

Previous (3 slides) Next
Search the fossil gallery

Paleontology and geology

During the Ordovician, Illinois lay in the tropics south of the equator, and a warm shallow sea covered the state. Later in the Ordovician, sandstones, such as the St. Peter Sandstone, were deposited over much of the state. Fossils from this time period include corals, encrusting algae, trilobites, brachiopods, bryozoans, snails, and nautiloids that thrived in the warm waters. This map indicates the presence of Ordovician rocks over much of northern Illinois.

Links to more on the Ordovician in Illinois

Organizations | Education and Exhibits | Research and Collections | Resources


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.

top Top of List

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.

top Top of List

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.

top Top of List


Image Collections (showing 1 of 1 listings)

Ordovician Fossils in Ogle County, Illinois: An amateur collection of fossils gathered at various sites in Illinois, primarily Ordovician.

top Top of List

Wisconsin State Map
Indiana State Map
Kentucky State Map
Missouri State Map
Iowa State Map