This thing, all things devours. This thing, all things devours


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This thing, all things devours.

  • This thing, all things devours.

  • Birds, beasts, trees, flowers.

  • Gnaws iron, bites steel.

  • Grinds hard stones to meal.

  • Slays kings, ruins towns,

  • and beats high mountains down.

  • J. R. R. Tolkien: The Hobbit




Mechanical Weathering

  • Mechanical Weathering

  • Chemical Weathering

  • Soils













Frost

    • Frost
    • Fire






Major processes of chemical weathering

  • Major processes of chemical weathering

      • Dissolution
        • Soluble ions contained in underground water
      • Oxidation
      • Hydrolysis H+ or OH- ions
        • Reaction of any substance with water
        • Water’s ions replace different ions in mineral
        • Feldspars, most abundant crust minerals,
        • become fine clay particles.
        • Easily transported.






















Climate:

  • Climate:

    • Temperature
      • chemical weathering faster hot climates
      • Rates of frost wedging increased by fluctuations of temperature around freezing
      • Thermal expansion & contraction extreme in hot cloudless areas
    • Rainfall
      • increases chemical weathering
  • Parent Rock characteristics

  • Time

  • Slope

  • Organisms















Massanutten Mt., Va., a syncline

  • Massanutten Mt., Va., a syncline

  • Ridges sandstone

  • Valleys limestone and shale are less resistant

  • The north and south forks of the Shenandoah River flank Massanutten Mountain. Note the meanders on floodplains of thick, fertile soils



Каталог: ~csmart -> Geomorphology -> Lectures
~csmart -> The Mesozoic began 248 mya and ended 65 mya
~csmart -> Shorelines are places where bodies of water meet dry land
~csmart -> Lecture 15 Part 1 Systematic Description of Minerals Part 2a: Halides, Sulfates, and a discussion of Evaporite Deposits
Lectures -> Ordinary Waves are caused by wind
~csmart -> This is one of three employment centers for geologists, and it is presently enjoying a boom. The other boom employers are
~csmart -> A scalar is a quantity with a size, for example mass or length
~csmart -> Global tectonic theme of the Paleozoic assembly of the supercontinent, Pangaea. Global tectonic theme of the Paleozoic assembly of the supercontinent, Pangaea
~csmart -> Hydrology Basics We need to review fundamental information about physical properties and their units. Scalars and Vectors


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