The main surface features are impact craters, canyons, fault scarps, ridges, and troughs. Thick sequences of sedimentary (colluvial) breccia are generally formed next to fault scarps in grabens. Other landforms on Proteus include linear features such as scarps, valleys, and grooves. There are also a number of scarps, grooves, and valleys related to large craters. In addition to scarps, wrinkle ridges occur in the smooth plains materials. Surface ruptures associated with normal faults are typically simple fault scarps. The surface rupture manifested as prominent fault scarps, which range from to of vertical displacements. It often weathers to prominent scarps without talus. Its exterior walls are made of multiple sub-parallel scarps and terraces. Both types of mountains often have steep scarps along one or more margins. Spring-fed oases lie at the foot of some of the scarps. The Mahadeo hills are bold, presenting bare scarps of black rock like fortresses. Estimation of the number of slides is difficult because individual scarps conjoin. In addition, extensive linear cracks and scarps were observed. Some of these have scarps that dam lakes.