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Chemical Weathering [image] |
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Process by which rocks are decomposed, dissolved or lossened by chemical processes to form residual materials. |
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| slow, often invisible, movement of soil down a slope |
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Any chemical reaction of water with other substances. |
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When water infiltrates fractures in rock and freezes, the force of expansion is great enough to break the rock into smaller pieces. |
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| The downslope movement of large masses of earth materials due to the pull of gravity. |
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| The rapid downhill movement of a water-saturated mass of clay and silt. |
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| Rock material from which a solid is formed |
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| loose, weathered rock and organic material in which plants with roots can grow. |
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Cross section of soil layers above the parent material. |
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| The A-Horizon of soil; contains organic material, or humus, that forms from decayed plant and animal materials |
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| The process in which rocks are broken up by the action of water, the atmosphere, and organisms. |
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| a weak acid formed when carbon dioxide dissolves in water. |
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| Process by which earth materials are moved by natural agents like moving water, wind, and ice. |
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| a geological phenomenon which includes a wide range of ground movement, such as rock falls, deep failure of slopes and shallow debris flows. |
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Mechancial Weathering [image] |
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| When rocks are broken down without any change in the chemical nature of the rocks. Essentially torn apart by physical force, rather than chemical breakdown. |
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| soil remaining after the soluble elements have been dissolved. |
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The layer of soil under the topsoil on the surface of the ground. May contain substances such as clay. Has only been partially broken down by sunlight, air and water. |
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very fertile. Consist of minerals from a variety of transported rocks. |
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