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This list of the prehistoric life of Illinois contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Illinois. Precambrian [ edit ]
This list of the Paleozoic life of Illinois contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Illinois and are between 538.8 and 252.17 million years of age.
The environment of Pennsylvanian Illinois was comparable to the modern Amazon River delta. [9] Almost every Pennsylvanian deposit in Illinois preserves evidence of this ancient flora and such deposits are located in almost every region of the state. [12] The vegetation of these ancient swamps became Illinois' modern coal deposits. [9] [11]
A map showing approximate areas of various Mississippian and related cultures. The Koster Site is located near the center of this map in the upper part of the Middle Mississippi area. The Koster Site is a prehistoric archaeological site located south of Eldred, Illinois. The site covers more than 3 acres and extends 30 feet down into the ...
Lake Chicago was a prehistoric proglacial lake that is the ancestor of what is now known as Lake Michigan, one of North America's five Great Lakes.Formed about 13,000 years ago and fed by retreating glaciers, it drained southwest through the Chicago Outlet River.
Ordovician rocks in Illinois are divided into three series, each separated by an unconformity; from oldest to youngest, these are the Canadian, Champlainian, and Cincinnatian series. Ordovician features in Illinois include the now-buried Glasford Structure in Peoria County , a crater caused by a meteorite impact roughly 455 million years ago.
[2] [3] [10] [11] More recent geologic mapping, coring, and optically stimulated luminescence (OSL) dating of Illinoian glacial tills (Glasford Formation) and outwash (Pearl Formation) of the Illinoian Glacial Lobe in North-central Illinois demonstrates that the start of the Illinoian stage and end of the Pre-Illinoian stage correlates with the ...
With various matching funds programs, Illinois FIRST provided $2.2 billion for schools, $4.1 billion for public transportation, another $4.1 billion for roads, and $1.6 billion for other projects. In 1993 Illinois became the first Midwestern state to elect a black person to the US senate before the term of Carol Moseley Braun .