Class 8a: Weathering and mass wasting

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Class 8a Weathering and mass wasting
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Gradational processes

1. Weathering
2. Mass wasting
3. Erosion/deposition

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Weathering

• Weathering breaking down of rock

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Weathering

• Speed of weathering?
• Bedrock
• Climate
• Vegetation
• Steepness and orientation of slope

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Mechanical weathering

• Mechanical weathering breaks rocks into smaller
  pieces

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Chemical weathering

• Changes the chemistry of rocks

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Karst
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Karst caves and caverns
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Karst aboveground formations
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Mass wasting

• Downward movement of material due to gravity

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Mass wasting creep

• Creep nearly imperceptible movement

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Mass wasting flow

• Flow High moisture content

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Mass wasting slide

• Slide Sudden movement of non-saturated material

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Mass wasting slide

• Three landscape consequences

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Mass wasting fall

• Fall Rock goes airborne

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Erosion and deposition

• Erosion
• Transport
• Deposition

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Aeolian processes

• Aeolian related to wind

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Deflation and abrasion

• Deflation removal and lifting of particles
• Abrasion sandblasting or polishing

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Aeolian transport
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Aeolian deposition