Middle and Late Ordovician Shelf Activation and Foredeep Evolution, Central Appalachian Orogen
Gary G. Lash, 1988. "Middle and Late Ordovician Shelf Activation and Foredeep Evolution, Central Appalachian Orogen", The Trenton Group (Upper Ordovician Series) of Eastern North America: Deposition, Diagenesis, and Petroleum, Brain D. Keith
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Early Paleozoic foredeep evolution in the central Appalachian orogen can be described in terms of five stages: (1) Stable Shelf, (2) Initial Uplift of Shelf, (3) Shelf Exposure, (4) Collapse of Peripheral Bulge, and (5) Basin Fill. In addition, strike-parallel variations in central Appalachian foredeep stratigraphy reflect collision along the irregular, early Paleozoic North American continental margin.