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Showing 1 to 1 of 1 for “"Stratigraphic--Ordovician; Petrology--Williston Basin; Geology--Williston Basin"”.
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Depositional environments and history of the Winnipeg Group (Ordovician), Williston Basin, North Dakota
<p>The Winnipeg Group (Ordovician) in the Williston Basin, North Dakota, contains three formations. They are, in ascending order, the Black Island Formation, herein informally divided into lower and upper members, the Icebox Formation, and the Roughlock Formation. Strata of the Winnipeg Group …