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Illinois Caverns is a state natural area in the New Design Precinct of Monroe County, Illinois. It features Illinois Caverns which is alternatively known as Mammoth Cave of Illinois (also Burksville Cave, Egyptian Cave, Eckert Cave). Illinois Caverns is the second-largest cave in Illinois and has more than 9.6 km of passages. [1]
Illinois has a maximum north–south distance of 390 miles (630 km) and 210 miles (340 km) east-west. Total area is 57,918 square miles (150,010 km 2 ), ranked 25th in size of the 50 states. Water area is 2,325 square miles (6,020 km 2 ); Lake Michigan accounts for most of this. Charles Mound in the northwest Driftless Area is the highest point ...
Illinois' ecology is in a land area of 56,400 square miles (146,000 km 2); the state is 385 miles (620 km) long and 218 miles (351 km) wide and is located between latitude: 36.9540° to 42.4951° N, and longitude: 87.3840° to 91.4244° W, with primarily a humid continental climate.
In 1958, the Illinois Beach Hotel was opened within the park. Geology. The park is located in the 12 mile long Zion Beach Ridge Plain. The Zion Beach Ridge Plain is 3,700 years old and composed of curvilinear ridge-and-swale topography. The beach ridges support black oak savanna habitat, while wetlands dominate the swales.
Lake Chicago. Map of middle stage of glacial Lake Chicago, USGS Report of 1915. 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.
Paleogeographic reconstruction showing the Illinois Basin area during the Middle Devonian period. 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.
Mississippi Palisades State Park. / 42.13835°N 90.15902°W / 42.13835; -90.15902. Mississippi Palisades State Park is a National Natural Landmark located in Carroll County, Illinois, just north of the town of Savanna. It is a partially conserved section of the Mississippi Palisades. The area contains many caves and large cliffs along ...
August 6, 1998. Cave-In-Rock State Park is an Illinois state park, on 204 acres (0.83 km 2 ), in the town of Cave-in-Rock, Hardin County, Illinois, in the United States. The state park contains the historic Cave-In-Rock, a landmark of the Ohio River. It is maintained by the Illinois Department of Natural Resources (IDNR).