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Coal Measures and Coal Mining in Iowa, including paleontology and a discussion on the coal formation; also the methods of mining by Russell T. Hartman, 1898

Coal Measures and Coal Mining in Iowa by Russell T. Hartman, 1898, Page 6

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The Augusta Stage This stage is named from the town of Augusta about ten miles south west of the city of Burlington. Here the entire succession of the Augusta, from the Kinderhook to the "Geode Bed" is exposed. The Augusta stage is composed of what are generally known as the Burlington and Keokuk limestones. The typical exposures of these limestones are at the cities bearing the same names. The exposure of the Augusta along the Mississippi river is almost continuous from a point above Burlington to the north of the Des Moines river. These limestones are made up chiefly of crinoidal remains. There are, however, remains of molluscoids and mollusks. The cirnoidal
 
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