<P> The sedimentary rock in the eastern Appalachian Basin region was squeezed into great folds that ran perpendicular to the direction of forces . The greatest amount of deformation associated with the Alleghanian orogeny occurred in the Southern Appalachians (North Carolina, Tennessee, Virginia, and West Virginia). In that region, a series of great faults developed in addition to the folds . As the two continents collided, large belts of rock bounded by thrust faults piled one on top of another, shortening the crust along the eastern edge of North America in the North Carolina and Tennessee region by as much as 200 miles (320 km). The relative amount of deformation gradually diminishes as one travels northward . The fold belt extends northward through Pennsylvania and gradually fades in the vicinity of the New York border . The Kittatinny Mountains in northwestern New Jersey mark the Northeastern-most extension of the high ridges of the Valley and Ridge Province . The influence of Alleghanian deformation on the regions east of the Valley and Ridge Province must have been even more intense; however, there is little evidence preserved . Rocks of Mississippian, Pennsylvanian, and Permian age are missing along the Eastern Seaboard . </P> <P> The mountains formed by the Alleghanian orogeny were once rugged and high, but in our time are now eroded into only a small remnant: the heavily - eroded hills of the Piedmont . Sediments that were carried eastward formed the coastal plain and part of the continental shelf . Thus, the coastal plain and Piedmont are largely the byproducts of erosion that took place from 150 + million years ago to the present . </P> <P> Sediments that were carried westward formed the Allegheny and Cumberland Plateau, which in some areas are popularly called mountains, but are actually simply uplifted and eroded plateaus . </P> <P> A portion of the Alleghanian mountain system departed with Africa when Pangaea broke up and the Atlantic Ocean began to form . Today, this forms the Anti-Atlas mountains of Morocco . The Anti-Atlas have been geologically uplifted in relatively recent times, and are today much more rugged than their Alleghanian relatives . </P>

What were the final results of the alleghenian orogeny and ouachita orogeny