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Selected Paleozoic taxa of Illinois. Illustration of a fossil of the Carboniferous-Permian spider Arthrolycosa. Charles Emerson Beecher (1889). Fossil of the Middle-Late Ordovician giant trilobite Isotelus. Life restoration of the Carboniferous-Permian amphibian Phlegethontia.
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 alluvial deposits of the Illinois River valley. Over the course of its excavation between 1969 and 1978, Koster produced deeply buried evidence of ancient human occupation from the early ...
The McCune Mound and Village Site is a prehistoric archaeological site located in Whiteside County, Illinois near the city of Sterling. The site consists of a single mound, 3 metres (9.8 ft) high and 23 metres (75 ft) in diameter, and five depressions that may have been housing sites. The site was occupied by Upper Mississippian peoples from ...
1910–2020 [1] The history of Illinois may be defined by several broad historical periods, namely, the pre-Columbian period, the era of European exploration and colonization, its development as part of the American frontier, its early statehood period, growth in the 19th and 20th centuries, and contemporary Illinois of today.
North American. Definition. Chronological unit. Age. Stratigraphic unit. Stage. The Pre-Illinoian Stage is used by Quaternary geologists for the early and middle Pleistocene glacial and interglacial periods of geologic time in North America from ~2.5–0.2 Ma (million years ago). [ 1]
December 18, 1978 [ 2 ] The Riverton Site is an archaeological site located immediately west of the Wabash River and northeast of Palestine, Illinois. The site, which dates from the Late Archaic period (3000-1000 BCE), is the type site of the Riverton culture. The Riverton culture, of which only three known sites had been discovered as of 1978 ...
Paleontology in Illinois refers to paleontological research occurring within or conducted by people from the U.S. state of Illinois. Scientists have found that Illinois was covered by a sea during the Paleozoic Era. Over time this sea was inhabited by animals including brachiopods, clams, corals, crinoids, sea snails, sponges, and trilobites.
Paleogeographic reconstruction showing the Illinois Basin area during the Middle Devonian period. [9] Almost all Silurian rocks in Illinois are deep-water limestone and dolomite deposits; reef habitats were common, and fossils of reef organisms are locally highly abundant, including corals, brachiopods, crinoids, stromatoporoids, and bryozoans. [6]