Photo 12.7 There is strong structural and lithologic control of large scale geomorphology in the tectonically inactive Appalachian Mountains of eastern North America. This NASA radar image shows the large plunging folds of the Valley and Ridge physiographic province near Harrisburg, PA. The ridge lines are held up by resistant sandstone and the valleys are dominated by shale and limestone. The view is about 20 miles wide. GEOMORPH0000006292. Image by NASA.
Photo 12.8 Scarps provide surface evidence of faulting . A. Thrust fault scarp in Tibet offsets a river terrace on which the vehicle is parked. Photo by R. Hetzel. GEOMORPH0000006296. B. Normal fault scarp in limestone in the northern Galilee of Israel leads directly to a village. GEOMORPH0000000411. C. Fence offset by the 1906 San Francisco earthquake along the strike-slip San Andreas fault in Marin County, CA. Photo by G.K. Gilbert. GEOMORPH0000003322
