GEOG 1011 Midterm: Geog 1011 midterm 2 study guide
10 Mar 2017
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Maximum likeliness is at depth: thermal expansion cracking: rising surface temperatures cause expansion. The stress of this expansion causes fractures: oxidation/hydration cracking: changes occur in one mineral. Iron oxidizes, potassium ions leave, and water enters these vacant spaces and the structure expands. Biotite expands as it oxidizes and hydrates: biophysical processes (root wedging): roots breakthrough and fracture material. The first step in environmental weathering: chemical weathering processes, congruent dissolution: the mineral completely dissolves. The reactant is the mineral and the produce is ions in solution. Example, a halite reaction happens when nacl becomes. Na + cl: incongruent dissolution: primary mineral transformation. The products are ions in solution and a different mineral. If mineral a is a primary silicate mineral, the produced mineral will be a clay: oxidation-reduction reactions: the primary mineral is transformed by a transfer of electrons between atoms. The reactant is the metal in a mineral and oxygen.
