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Weathering, Soil, and Mass Wasting
Terms in this set (20)
weathering, mass wasting, erosion
driven by the earths interior. ex: volcanoes, earthquakes, and mountain building
the physical breakdown (disintegration) and chemical alteration (decomposition) of rocks at or near Earth's surface
the transfer of rock and soil downslope under the influence of gravity
the physical removal of material by mobile agents such as water, wind, or ice
accomplished by physical forces that break rock into smaller and smaller pieces without changing the rock's mineral composition
a chemical transformation of rock into one or more new compounds
After water works its way into the cracks in rock, the freezing water enlarges the cracks and angular fragments are eventually produced
Large domed shaped structures usually composed of granite, formed by sheeting. when a rock forms deep underground from lots and lots of pressure. when it comes up it tries to rise and expand
A mechanical weathering process characterized by the splitting-off of slablike sheets of granitic rock.
weathering process that tends to produce a spherical shape from an initially blocky shape.
the process by which softer, less weather resistant rocks wear away and leave harder, more weather resistant rocks behind
the layer of rock and mineral fragments produced by weathering covering Earth's land surface
combination of mineral and organic matter, water, and air-that portions of the regolith that supports the growth of plants
Relative amounts of the different types and sizes of mineral particles in a sample of soil.
material from which a soil is formed, determines composition and properties of the soil
the washing out of fine soil components from the A horizon by downward-percolating water
Process in which various chemicals in upper layers of soil are dissolved and carried to lower layers and, in some cases, to groundwater.
o,a, e, and b horizons; tose layers in which plant roots are most active. "true soil"
a soil classification system consisting of six hierarchal categories based on observable characteristics--recognizes 12 types of soil
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