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The Devonian Jeffersonville Limestone is a mapped bedrock unit in Indiana and Kentucky. It is highly fossiliferous. ==Description== The Jeffersonville is a coarse grained, dark gray, thick bedded, fossiliferous limestone.〔Butts, Charles, 1915, Geology and mineral resources of Jefferson County, Kentucky: Kentucky Geological Survey (), 4th series, v. 3, pt. 2, 270 p.〕 R. D. Perkins (1963) divided the Jeffersonville into five zones based on petrology and fossil content,〔Ronald D. Perkins, 1963, Petrology of the Jeffersonville Limestone (Middle Devonian) of Southeastern Indiana: Geological Society of America Bulletin (1963), 74(11):1335-1354 (abstract )〕 and these are summarized below (in stratigraphic order): * ''Paraspirifer acuminatus'' zone (top) * fenestrate bryozoan-brachiopod zone * ''Brevispirifer gregarius'' zone * ''Amphipora''-zone * Coral zone (base, overlies Geneva Dolomite or Louisville Limestone) 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Jeffersonville Limestone」の詳細全文を読む スポンサード リンク
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