Class 8a: Weathering and mass wasting. Gradational processes 1.Weathering 2.Mass wasting 3.Erosion/deposition.

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Presentation transcript:

Class 8a: Weathering and mass wasting

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

Weathering Weathering: breaking down of rock

Weathering Speed of weathering? Bedrock: Climate: Vegetation: Steepness and orientation of slope

Mechanical weathering Mechanical weathering breaks rocks into smaller pieces

Chemical weathering Changes the chemistry of rocks

Karst

Karst: caves and caverns

Karst: aboveground formations

Mass wasting Downward movement of material due to gravity

Mass wasting: creep Creep: nearly imperceptible movement

Mass wasting: flow Flow: High moisture content

Mass wasting: slide Slide: Sudden movement of non- saturated material

Mass wasting: slide Three landscape consequences:

Mass wasting: fall Fall: Rock goes airborne

Erosion and deposition Erosion: Transport: Deposition:

Aeolian processes Aeolian: related to wind

Deflation and abrasion Deflation: removal and lifting of particles Abrasion: sandblasting or polishing

Aeolian transport

Aeolian deposition