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NTAdams County Illinois
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RTChattanooga Shale
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Illinois Basin  search
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SNStructural basin. Indexed with states as applicable.
Illinois Deep Hole Project  search
RTboreholes
 continental crust
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 Illinois
SNBorehole in Stephenson County, NW Illinois. Added to Thesaurus in 1985.
Illinois River  search
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SNRiver in many locations. In N and W Illinois, formed by the confluence of Des Plaines and Kankakee rivers and flows W and SW to the Mississippi River. Also in Jackson County Colorado, N Colorado. Also in Benton County Arkansas, NW Arkansas; and Adair, Seq
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