Subsequent erosion of the Targhee Uplift was driven by steepened stream gradients. The escarpment was later steepened by glacial scouring. As the rush of water eroded the surface, it steepened into a waterfall. This steepened the stream gradient of the ancestral rivers and other streams on the plateau. This steepened the stream gradient of the ancestral Virgin and other rivers on the plateau. Above the bench, the grade steepened into a 500-foot face of rock called the "palisades". She also developed a list to starboard which steepened to 75 degrees. The right wing came to point down as the turn steepened. Hillslopes are steepened past the angle of repose for noncohesive materials. Among urban workers, socio-economic problems steepened during periods of industrial depression.