145:. Between 1880–1920s, Southern Illinois played a national role in timber production. Individual acres of bottom land hardwoods yielded 25,000 board feet compared with an average Illinois bottom land forest at 9,000 board feet. As a consequence of the reckless clearing, intensive logging, and the local practice of annually burning off the woods, southern Illinois hill-land was severely eroded or badly damaged by 1930. In the first year of operation, 1933–1934, the
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133:. The combined effects of tremors, glacial melt waters, rain, freezing, thawing and wind have naturally sculpted the bluffs into several unusual formations. Unlike much of Illinois, this plateau was never covered by glaciers; the furthest advance of ice sheets during the Illinoisan glaciation stopped just north of the area. Large areas are rounded and bare of vegetation.
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brought much needed jobs to the poverty stricken areas; a total of 40,888 acres in options was approved on 263 tracts at an estimated cost of $ 4.59 per acre. By 1939, the
Shawnee National Forest had 183,446 acres purchased or optioned, and on September 6, President Roosevelt proclaimed the purchase
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As with other wilderness areas within the
Shawnee National Forest, One Horse Gap is made of second-growth forested areas, also known as a "Depression Forest." Until the land condemnations of the 1930s, this land was mainly used for
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in what is now called
Southern Illinois. The eroding sandstone rocks are the remains of mountains that are over 300 million years old. The area is geologically located on the south edge of an east-west
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112:(circa 300 million years before the present), local geological conditions laid down a thick bed of gray
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It may require cleanup to comply with
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http://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb5106361.pdf
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A major contributor to this article appears to have a
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205:http://www.backpackcamp.com/OneHorseGap.html
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187:"The Great Depression and New Direction"
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175:. Cache River Press. p. 47.
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171:McPherson, Alan (2005).
147:Civil Conservation Corps
222:Shawnee National Forest
152:Shawnee National Forest
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110:Carboniferous period
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