STS61A-041-0082 Caprock Escarpment, Texas, U.S.A. November 1985 The north-south-oriented Caprock escarpment, separating the high plains from erosional lands of the Permian Plain, is featured in this northeast-looking, low-oblique photograph. Though not a high escarpment, the differences in landscape and land use on either side of the escarpment are apparent. Barely discernible is four-lane U.S. Highway 87, which connects Big Spring and Lubbock.