GEOG 1400 Lecture Notes - Lecture 2: Desert Pavement, Geomorphology, Dune
15 Mar 2018
School
Department
Course
Professor
Document Summary
Aeolian geomorphology (the work of the wind) Long, narrow ridges, many kilometers long: parallel with the wind direction, morphology associated with wind turbulence in between dune crests. Dune crests at right angles to the wind. Wavelike dunes develop on a very abundant sand supply. A huge (cid:395)uantity of sand, a (cid:862)sand sea(cid:863): reg. Flat sand areas protected with a cover of pebbles desert pavement. Patterns of wind movement over common dune types (d) coastal features. In coastal regions, significant supply of sand and high wind speeds: dunes usually protected by tiny vegetation cover (harsh environment for most species, coastal dunes (cid:862)t(cid:396)ap(cid:863) sand being blown from beach to land; protective barrier. Transverse dunes and parabolic dunes may be observed. Extensive areas of loess deposits in many midlatitude areas of the world. Deflation is commonly induced by the human activity of farming and herding: when human activities destroy the grass cover over fine soils the soils can be blown away through deflation.
