01:460:103 Lecture Notes - Lecture 8: Barchan, Loess, Dune

• School: Rutgers University
• Department: Geological Sciences
• Course: 01:460:103
• Professor: professor Feignson

Document Summary

A broad, gently sloping, depositional surface formed at the base of a mountain range in a dry region by the coalescing of individual alluvial fans. barchan. A crescent-shaped dune with the horns of the crescent pointing downwind. blowout. A depression on the land surface caused by wind erosion. butte. A narrow pinnacle of resistant rock with a flat top and very steep sides. deflation. The removal of clay, silt, and sand particles from the land surface by wind. desert. A region with low precipitation (usually defined as less than 25 cm per year). fault. A fracture in bedrock along which movement has taken place. flash flood. Flood of very high discharge and short duration; sudden and local in extent. loess. A fine-grained deposit of wind-blown dust. longitudinal dune (seif) Large, symmetrical ridge of sand parallel to the wind direction. mesa. A broad, flat-topped hill bounded by cliffs and capped with a resistant rock layer. parabolic dune.