L secondary controls topography relief and aspect and

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l Secondary controls: topography (relief and aspect) and vegetation (changes chemistry and is active physically).
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02/02/2012 6 Climate controls weathering. Wet climates (e.g., temperate and tropical) favor chemical weathering while hot and cold deserts favor physical weathering)
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02/02/2012 7 Global distribution of precipitation
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Physical weathering produces particles (silt, sand, gravel, boulders)
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02/02/2012 9 Chemical weathering produces dissolved ions in rivers and groundwater
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02/02/2012 10 Some rocks and minerals are completely dissolved during chemical weathering (e.g., limestone, gypsum, halite) but others will loose some ions and produce secondary minerals like clays and metal oxides.
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02/02/2012 11 As I mentioned before, susceptibility of a silicate mineral to chemical weathering is related to the Bowen’s reaction series that governs which minerals crystallize first as magma cools
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02/02/2012 12 Erosion through mass wasting (or slope movement). As with a block on a ramp, the presence of a slope produces a slope- parallel shearing force that transports debris downhill.
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02/02/2012 13 Morphology of a Rocky Slope
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02/02/2012 14 Morphology of a Slope with Thick Soil Cover
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02/02/2012 15 Weathering and mass wasting can lead to landslides. Landslides = steep slopes, wet conditions.
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02/02/2012 16 Different debris sizes have different angles of repose
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02/02/2012 17 Types of Mass Wasting l Creep
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