Platforms with dimples and grooves offer plausible evidence of relative stability. They are of etch origin and the near-surface rock, the former weathering front, is laminated to a maximum depth of about a metre. Saucer-shaped depressions etched in the front develop into rock basins, but apart from this and the incision of some gutters, especially Kluftkarren, the platforms between clefts remain virtually untouched. They provide a datum against which changes in local relief amplitude may be measured.
展开▼
