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Zorluk: OrtaWeathering and Mass Wasting Processes

In desert environments, extreme diurnal temperature variations cause the outer layers of exposed rock to expand during the day and contract at night, eventually resulting in the peeling off of concentric rock sheets. Which weathering process does this describe?

  1. ExfoliationCevap
  2. B
    Mudflow
  3. C
    Carbonation
  4. D
    Frost shattering

Cevap

Exfoliation
The process described is exfoliation (thermal weathering), where differential heating between the outer rock layer and the cooler interior causes stresses that detach concentric sheets of rock in dry, arid regions.

Adım Adım Çözüm

1
Analyze the environmental conditions and physical process described in the stem.
The scenario highlights large day-to-night (diurnal) temperature changes in arid regions leading to thermal expansion and contraction.
Rocks are poor conductors of heat, so thermal stresses concentrate in the outermost layers.
2
Identify the specific mechanical weathering mechanism associated with peeling outer layers.
Repeated expansion and contraction create stress fractures parallel to the rock surface, causing outer sheets to split and peel off, known as exfoliation.
Exfoliation operates in-situ without initial downslope movement.

Anahtar Kavram

Thermal expansion and mechanical exfoliation of rocks
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Konular

Weathering and Mass Wasting Processes

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