will move farther into the thrust sheet to examine some Ashe Formation rocks (Stop 1–9) and an ultramafic body that occurs in this thrust sheet (Stop 1–10). Toward the end of Day 1 we will descend through several thrust sheets into the Grandfather Mountain window to exam-ine some amygdaloidal basalt in the Montezuma Mem- Journal of Structural Geology. Vol. 8, Nos. 3/4, pp. 269 to 279, 1986 0191-8141/86 $03.(11~ + 0.(KI Printed in Great Britain 1986 Pergamon Press Lid Topological constraints on imbricate thrust networks, examples from the Mountain City window, Tennessee, U.S.A. F. A. DIEGEL Department of Earth and Planetary Sciences, The Johns Hopkins University, Baltimore, MD 21218, U.S.A. (Received 18 July ... Kinematics of thrust sheets within transverse zones: a structural and paleomagnetic investigation in the Appalachian thrust belt of Georgia and Alabama Germa´n Bayonaa,*, William A. Thomasa, Rob Van der Voob aDepartment of Geological Sciences, University of Kentucky, Lexington, KY 40506, USA These thrust sheets were created as a result of continental convergence (mountain building). Outcrops that contain mostly resistant rocks (such as sandstone or siltstone) form ridges. Outcrops that consist primarily of less resistant rocks (such as limestone or soft shale) form valleys. Backthrusts are thrust sheets that are directed back in the opposite direction of foreland propagation. Forethrusts are the most common formation, backthrusts are rare. One idea on how backthrusts are created is the formation of shear fractures in conjugate sets with opposite dip.