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The earliest Carboniferous rocks sit conformably on top of the youngest Devonian in Illinois; Carboniferous rocks in the state are areally extensive, regionally very well-exposed, and form a large percentage of the state's bedrock. Illinois remained marine for much of the Carboniferous, with limestones making up most of the rock deposited ...
The Lincoln Log Cabin State Historic Site is an 86-acre (0.3 km 2) history park located eight miles (13 km) south of Charleston, Illinois, U.S., near the town of Lerna. ...
Landforms of Illinois by county (103 C) Bodies of water of Illinois (5 C) Wetlands of Illinois (2 C, 14 P) A. Algific talus slopes (3 P) Natural arches of Illinois (2 ...
The western section (west of the Illinois River) was originally part of the Military Tract of 1812 and forms the distinctive western bulge of the state. Central Illinois is characterized by small towns and mid-sized cities. Agriculture, particularly corn and soybeans, figures prominently. Major cities include Peoria, and Springfield (the state ...
Illinois averages approximately 51 days of thunderstorm activity a year, which ranks somewhat above average in the number of thunderstorm days for the United States. Illinois is vulnerable to tornadoes, with an average of 54 occurring annually, which puts much of the state at around five tornadoes per 10,000 sq mi (30,000 km 2) annually. [74]
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.
As the one-year anniversary of the March 31, 2023, tragedy approaches, the owners of the more than 100-year-old Belvidere, Illinois, venue and the promoters of the concert are facing nearly a ...
Of the fifty U.S. states, Illinois has the fifth-largest gross domestic product (GDP), the sixth-largest population, and the 25th-most land area. Its capital city is Springfield in the center of the state, and the state's largest city is Chicago in the northeast. Present-day Illinois was inhabited by Indigenous cultures for