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The Illinois Basin is a Paleozoic depositional and structural basin in the United States, centered in and underlying most of the state of Illinois, and extending into southwestern Indiana and western Kentucky. The basin is elongate, extending approximately 400 miles (640 km) northwest-southeast, and 200 miles (320 km) southwest-northeast.
Basalt fiber is made from a single material, crushed basalt, from a carefully chosen quarry source. [1] Basalt of high acidity (over 46% silica content [2]) and low iron content is considered desirable for fiber production. [3] Unlike with other composites, such as glass fiber, essentially no materials are added during its production.
The Kincaid Mounds Historic Site (11MX2-11; 11PO2-10) [3] c. 1050–1400 CE, [4] is a Mississippian culture archaeological site located at the southern tip of present-day U.S. state of Illinois, along the Ohio River.
The Shawnee Hills are a region within the larger Interior Low Plateaus physiographic province located in southern Illinois, southern Indiana, and western Kentucky. [1] In Illinois it rests mainly in an east–west arc roughly following the outline of the southern end of the Illinois Basin .
Charles Mound is located on rolling farmland that is privately owned. The landowners allow public access on the first full weekends of the months of June, July, August, and September as well as President's Day Weekend in February. Public access to the property is at 688 W. Charles Mound Rd., where there is a gate and access to the highpoint by ...
Thornton Quarry, just south of Chicago, Illinois. One of the largest aggregate quarries in the world, 1.5 miles (2.4 km) long, 0.5 miles wide, and up to 450 feet deep, site of a Silurian reef. Quarried since 1836. The quarry also acts as an emergency flood control reservoir as part of Chicago Deep Tunnel project.
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.
name = Illinois Name used in the default map caption; image = USA Illinois location map.svg The default map image, without "Image:" or "File:" image1 = USA Illinois relief location map.svg An alternative map image, usually a relief map, which can be displayed via the relief or AlternativeMap parameters; top = 42.7 Latitude at top edge of map ...