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The Plattin Limestone is a Middle Ordovician geologic formation in Arkansas, Illinois, and Missouri. [1] The name was first introduced in 1904 by Edward Oscar Ulrich in his study of the geology of Missouri. [2] A type locality was designated at the mouth of the Plattin Creek in Jefferson County, Missouri, however a stratotype was not assigned ...
More recently, a World Ortelius map sold for £4,000 (about $5,000) at an auction in 2012. These maps are celebrated for their artistry and the way they reflect the geographical knowledge of the ...
Arch Coal was formed in July 1997 through the merger of publicly traded Ashland Coal, Inc. and privately held Arch Mineral Corporation. Arch Mineral had its origins in 1969, when it was formed as a partnership between Ashland Oil (now Ashland Inc.) and the H.L.Hunt family of Dallas, Texas; Ashland Coal was formed in 1975 as a wholly owned subsidiary of Ashland Oil.
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 Goshen Settlement was an early American pioneer settlement in what is now Illinois, United States, located to the east of St. Louis, Missouri.The settlement was located about one mile (1.6 km) southwest of modern Glen Carbon, Illinois, at the point where Judy's Creek emerges from the bluffs into the American Bottoms, on its way to the Mississippi River.
What is now known as Illinois Caverns hosted its first paying customers in March 1901, operated by a Mr. White of East Saint Louis. It is the only cave in Illinois to have been commercially operated, attracting many visitors from St. Louis during the 1904 World's Fair. However the cave was never considered a commercial success (it closed in ...
Initially, Arkansas bauxite met 90% of US aluminum demand. Underground mining before and during World War II gave way to open pit mining in the 1960s. During the war, up to six million tons were mined in 1943. Arkansas bauxite mines were often passed over in favor of higher quality bauxite reserves in the Caribbean and mining ceased in 1982.
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