The fretted terrain on Mars (found 30°N to 50°N and 0°E to 80°E) is a transitional zone between highly cratered uplands and younger, less cratered lowlands, which exhibits flat-topped, steep-walled mesas and knobs (Sharp, 1973). These mesas and knobs are separated by younger flat-lying lowlands and lineated lobate debris aprons thought to result from ice-facilitated mass-wasting process from either ground or atmospheric sources.