GEOL 1340 Lecture Notes - Lecture 29: Tectonic Uplift, Mass Wasting, Dynamic Equilibrium
22 Nov 2016
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With hydrosphere and atm on continents thru: lithosphere interactions. Mass wasting: earth"s external processes, e, landscapes. Mass wasting: transfer or rock and soil downslope under g. G working by moving material down slope. Require e by sun and earth"s internal heat. Open system with highly variable inputs of e and material. Uplift of land create potential e of position above sea level. Balancing act btwn tectonic uplift and landscape reduction by w, e, mw. Chem: major processes of chem w. H ion attacks and replaces other ions. Residual clay and dissolved ions common products. All ions in solution: no residual minerals. Fe o (hematite) common product: factors affecting w. Weaken rock and allow water to enter. Chem w faster in warm, moist climates. Tree roots enter and pry apart fractures. Organic acids contribute to chem w: susceptibility to w. K and na rich feldspar (dry climates) Calcite (soluble in weakly acidic water: erosion.
