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The AAPG/Datapages Combined Publications Database
Rocky Mountain Section (SEPM)
Abstract
Paleogeography of the Late Early Mississippian (Tournaisian 3) in the Central and Southwestern United States
Abstract
Analysis of biostratigraphic relations in central North America permits recognition of a generalized, widely applicable depositional model for late Early Mississippian (=Tournaisian 3 and early Osagean) strata. Depositional strike paralleled the low, but subaerial, southwest-northeast trending Transcontinental Arch. Four depositional magnafacies (Carbonate Shelf, Starved, Novaculitic and Clastic) are discernible and the Carbonate Shelf Magnafacies can be further subdivided into Inner Shelf, Main Shelf and Shelf Margin Depofacies. The areal distribution of the four magnafacies is similar to such depositional facies in the European Lower Carboniferous, where the carbonate shelf deposits are called ‘Kohlenkalk’ or ‘Carboniferous Limestone’ and the other three have been referred to collectively as the ‘Culm’ Facies.
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