A fault scrap is a small offset of the ground surface moves vertically with the respect to the other and the faulting is attributes to the displacement of the land with the movement along the faults and is indicated by the consequent erosion along the geologic faults. They are hard and weak rocks and the scrap formation is equal to the vertical weight displaced.
Dune deflation hollows are where wind has removed sand down to a level where a layer of particles too heavy for the wind to move (an armoured surface) stabilises the sand and prevents the surface being lowered further.
A crevasse is a deep, wedge-shaped opening in a moving mass of ice called a glacier. Crevasses usually form in the top 50 meters (160 feet) of a glacier, where the ice is brittle.
a mass of rocks and sediment carried down and deposited by a glacier, typically as ridges at its edges or extremity.
