GEOG 1F91 Lecture Notes - Frost Weathering, Lightning Strike, Anhydrite
20 Feb 2014
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Weathering/mass wasting: weathering the wearing down of solid rock. Weathering: controls, topography (shape of the landscape, vegetation, climate (temperature + moisture, physical or mechanical (basically the same thing, chemical. Joint & fracture formation: primarily through stress relief (failure under tension, unloading. Exfoliation: frost weathering, salt weathering, thermal, insolation weathering (heating and cooling, lightning strike, biological weathering, caso + 2h o -> caso, 2h o, (anhydrite) (gypsum, 2kalsi o + 2h + h o, (feldspar) (acidic atmosphere) (kaolinite) > al si o (oh) + 2k + 4sio: plants, humans. Largely controlled by moisture & temperature: chemical: Warm & wet (e. g. summer: mechanical (physical): Climamorphogenic regions: regions where certain combinations of climatically controlled geomorphic processes predominate and give rise to a distinctive character of the landscape. Water is involved in the following chemical weathering processes: hydration, hydrolysis, oxidation, carbonation, solution. Explain how the role of water differs in each of these reactions & processes.
