mesa Archives - Free ZIMSEC & Cambridge Revision Notes

Wind in deserts

A sandstorm in a desert. Image credit

A sandstorm in a desert. Image credit annechia.com ZIMSEC O Level Geography Notes: Wind in Deserts

Wind is responsible for eroding, transporting and depositing materials in deserts.
To learn more go to Wind Action in Deserts.
Various landforms are formed by the above processes. […]

Alluvial fan/Bajada/Bahada. Image credit MediaWiki

Alluvial fan/Bajada/Bahada. Image credit MediaWiki ZIMSEC O Level Geography Notes: Wadis and Bahadas

Wadis/Canyons

As already pointed out freak storms occur in deserts characterised by excessive precipitation over short periods of time.
Due to infiltration excess flow and even saturation excess flow there is significant run off in the […]

Messa (left) and Butte (right). Image credit channingchurch.com

Messa (left) and Butte (right). Image credit channingchurch.com ZIMSEC O Level Geography Notes: Mesa and Butte

Mesas and buttes are flat topped uplands with steep sides and often capped by hard resistant rocks.
Mesas and buttes are desert features created primarily by river erosion […]