Palinspastic reconstructions of Alleghanian compressive structures in the Valley and Ridge place severe constraints on acceptable models of crustal structure in the southern Appalachians. These reconstructions, in conjunction with available deep seismic reflection data, imply that the Carolina slate belt arc was transported westward relative to North American cratonal basement by at least 120 km during the late Paleozoic. At present, it is not possible to determine unequivocally whether this juxtaposition took place along subhorizontal intracrustal detachments or whether it was the result of the steepening of a pre-existing detachment surface to produce a high-angle lithosphere-penetrating boundary.

First Page Preview

First page PDF preview
You do not currently have access to this article.