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Environments of Origin of Black Shales
AAPG Bulletin, 1939Explanations of origin are reviewed and environments in which black muds are in process of deposition are considered. The causes of blackness are examined and attention is given to diagenetic processes that take place in black muds. It is concluded that colors of black muds are due to several components, of which some are developed in diagenesis and ...
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Black Shale—Its Deposition and Diagenesis
Clays and Clay Minerals, 1979AbstractBlack shale is a dark-colored mudrock containing organic matter that may have generated hydrocarbons in the subsurface or that may yield hydrocarbons by pyrolysis. Many black shale units are enriched in metals severalfold above expected amounts in ordinary shale.
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Cyclic and Dyscyclic Black Shale Formation
1982Cyclic and dyscyclic sedimentary processes forming black shales are discussed. Based on cycle length and its lithologic character four main types of variations can be distinguished: (1) Mega-scale cycles correspond to periods of the earth’s history with frequently occurring black shales.
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The Black Shale of Southwestern Virginia
The Journal of Geology, 1924Conclusions as to the age and correlation of the black shale in several sections measured in southwestern Virginia are presented by the writer. There are recognized in this area the Genesee shale, Portage shale, and Chemung formation, of Devonian age, and a black shale correlated with the Chattanooga shale but here called the Big Stone Gap shale, of ...
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Ordovician Black Shales of New York
Science, 1935R, Ruedemann, G H, Chadwick
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Paleoecological History of Pennsylvanian Black Shales
Ecology, 1964Rezneat M. Darnell +2 more
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