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Pit 11, which was located southwest of the town of Braidwood, Illinois, is known for its Essex Biota with a greater abundance of marine species. [9] Pit 11 is now Braidwood State Fish and Wildlife Area, an Illinois state park. Fossil collecting is allowed at the park with a permit. [10]
Fossils are common from the Ordovician through the Pennsylvanian. Illinois has a reputation for rocks bearing large numbers of trilobite fossils, often of very high preservational quality. [1] There is a gap in Illinois' geologic record from the Mesozoic to the Pleistocene. During the Ice Age, Illinois was subject to glacial activity.
Fossil of the Middle-Late Ordovician giant trilobite Isotelus. †Isotelus †Isotelus gigas †Isotelus maximus †Kionoceras †Latzelia – type locality for genus †Latzelia primordialis – type locality for species †Lepidodendron †Lepidodendron aculeatum †Lepidophyllum †Lepidostrobus †Lichas †Lingula †Liroceras; Lithophaga ...
Expert fossil preparator Bob Masek first discovered the specimen in the 1980s in the fossil deposits preserved at Illinois’ Mazon Creek Lagerstätte. (The German word is a term paleontologists ...
This article contains a list of fossil-bearing stratigraphic units in the state of Illinois, U.S. Sites. Group or Formation ... Glen Park Formation: Carboniferous:
But there's one extraordinary find of a bull shark on the Mississippi from 1937 in Alton, Illinois, north of St. Louis — less than 250 miles from southern Lake Michigan — that shows the hardy ...
These rocks suggest a gradual increase in local sea level over the time of the Cambrian; they also suggest that most sediment was being transported to the area from the North. Fossils are uncommon in the Cambrian of Illinois, but trilobites, brachiopods, gastropods, and trace fossils of worms have been discovered. [6]
An amateur fossil hunter discovered a 20,000-year-old Columbian mammoth tusk, the first intact find in Mississippi, revealing new insights into the state's prehistoric era.