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- The Deadwood Formation is a geologic formation of the Williston Basin and Western Canada Sedimentary Basin. It is present in parts of North and South Dakota and Montana in the United States, and in parts of Alberta, Saskatchewan, and southwestern corner of Manitoba in Canada. It is of Late Cambrian to Early Ordovician age and was named for exposures in Whitewood Creek near Deadwood, South Dakota. It is a significant aquifer in some areas, and its conglomerates yielded significant quantities of gold in the Black Hills of South Dakota. It preserves trace fossils such as Skolithos, and remains of Late Cambrian trilobites and brachiopods, as well as Ordovician fossils. A 20 MW geothermal power plant is under construction, drilling 3.5 kilometers down. (en)
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- 8795 (xsd:nonNegativeInteger)
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- The Deadwood Formation at Fallingrock cliff in Dark Canyon in the Black Hills, South Dakota. (en)
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- Darton, N.H. and Paige, S. (en)
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- Precambrian rocks, or Lebold Formations Earlie and Pika Formations (en)
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- Williston Basin and Western Canada Sedimentary Basin (en)
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- Red River, Winnipeg & Englewood Formations & Elk Point Group (en)
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- The Deadwood Formation is a geologic formation of the Williston Basin and Western Canada Sedimentary Basin. It is present in parts of North and South Dakota and Montana in the United States, and in parts of Alberta, Saskatchewan, and southwestern corner of Manitoba in Canada. It is of Late Cambrian to Early Ordovician age and was named for exposures in Whitewood Creek near Deadwood, South Dakota. It is a significant aquifer in some areas, and its conglomerates yielded significant quantities of gold in the Black Hills of South Dakota. (en)
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