Distinctively Arid Geomorphological Processes (AQA A-Level Geography): Flashcards
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Main type of weathering in hot deserts
Main type of weathering in hot deserts
Mechanical or physical weathering
Thermal fracture
Thermal fracture
Weathering from rapid heating/cooling of rocks in deserts
Diurnal range
Diurnal range
Difference between daytime high and nighttime low temps
Exfoliation (weathering)
Exfoliation (weathering)
Outer rock layers peel off (onion-skin weathering)
Hydrolysis process
Hydrolysis process
Acidic water + rock minerals form clays & dissolvable salts
Oxidation effect in hot deserts
Oxidation effect in hot deserts
Creates red-brown colour on surface rocks (rust)
Desert varnish
Desert varnish
Red stain/glaze from iron & manganese oxides on surfaces
Abrasion (wind erosion)
Abrasion (wind erosion)
Wind-carried material hits rocks (sandblasting effect)
Deflation (wind process)
Deflation (wind process)
Wind removes fine particles, leaving coarse pebbles behind
Reg or desert pavement
Reg or desert pavement
Surface of coarse/fine pebbles left after deflation