“…Closely following the Caledonian cycle of orogeny, however, was the Early Devonian (Pragian; mid-Ulsterian) inception of convergence by one or more Avalonian terranes with the southeastern margin of Laurussia. This episode of convergence, called the Acadian Orogeny, generated some of the best-known and variously interpreted delta complexes in the Appalachian Basin (Friedman and Johnson, 1966;Woodrow and Sevon, 1985;Faill, 1985;Ettensohn, 1985a). Convergence was probably transpressional, and beginning in late Early Devonian (Pragian-Emsian; mid-Ulsterian) time, progressed southwestwardly along the southeastern margin of Laurussia (Ettensohn, 1985a(Ettensohn, , 1987, resulting in a series of thick, clastic sequences that tracked the southwesterly progress of orogeny (Ettensohn, 1985a(Ettensohn, ,b, 1987.…”