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About 150,000 years ago, the area that is now known as Monroe County in southwest Illinois was covered in ice hundreds of feet thick. When the ice melted, the water flowed into fractures in the ...
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]
Category: Caves of Illinois. ... Illinois Caverns State Natural Area This page was last edited on 17 December 2016, at 02:36 (UTC). Text is available under the ...
13 Illinois. 14 Indiana. 15 Iowa. 16 Kentucky. ... This is a list of natural caves in the United States. Alabama ... Forestville Mystery Cave State Park; Niagara Cave ...
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The crustacean is endemic to the Illinois Sinkhole Plain of Monroe County and St. Clair County, in southwestern Illinois, including Illinois Caverns State Natural Area. [1] [2] Historically Gammarus acherondytes was known from six caves, but in a survey in 1995 the species was found at only three of the sites, with one further site inaccessible ...
Natural Landmarks in Illinois range from 53 to 6,500 acres (21.4 to 2,630.5 ha; 0.1 to 10.2 sq mi) in size. Owners include private individuals or organizations, and several county, state and federal agencies. [2] The National Natural Landmarks Program is administered by the National Park Service, a branch of the Department of the Interior. The ...
Pages in category "State Natural Areas of Illinois" The following 11 pages are in this category, out of 11 total. This list may not reflect recent changes. C.