Seismic Evidence for Upper Mantle Extension Beneath the Late Paleozoic Appalachian Orogeny
Vadim Levin, Jeffrey park, Mark Brandon and William Menke
submitted to Geology, 1999

Teleseismic shear wave data from stations (triangles) indicate that the upper mantle can be described by two anisotropic layers. The light arrow gives the fast direction in the top layer, the dark arrow the bottom layer.

End member models for the extension of the upper mantle beneath a convergent orogen.
PDF and Tex versions of paper. PDF Version of first draft.