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Geo chapter 12: Denudation: weathering & mass wasting
Terms in this set (24)
The slow downhill movement of water saturated rock and soil material.
When rocks suffer decay or alteration because of a change in chemical composition of the minerals that make them up.
The dropping of rock materIal that occurs when a drop of energy slows a transporting agent
The range of agents that constantly work to lower the earths surface to a common level
The movement of rock debris by water, ice, wind and wave action
raising of level of the land surface b/c inability of river to transport its load leading to deposition
fractures created by stresses and strains caused by tectonic processes such as folding, faulting, and tilting then the release of pressure when overlying rock layers are eroded
Parallel surfaces separating different layers of sedimentary rock
Process by which weathered rock and soil are moved from one place to another.
The process of lowering the earth's surface through wearthering, erosion, and transportation
As water seeps into rock fractures and joints, it freezes into ice crystals, expands, and splits rocks apart forming jagged edges and pointy boulders.
Any process that breaks rock down into smaller pieces without changing the chemistry of the rock; typically wind and water.
the disintegration of rocks caused by the differential heating and cooling of the minerals within them. Common in granitic rocks found in the desert
the expansion, cracking, and peeling of rock layers off a newly exposed rock surface resulting from the release of pressure due to the erosion of overlying bedrock
a form of chemical weathering in which oxygen combines with certain minerals in the rock to form oxides and hydroxides
a chemical reaction in which water combines with minerals to form hydroxides that expand and eventually cause the disintegration of the rock.
the downhill movement of weathered materials resulting from the pull of gravity.
the slow and unspectacular downhill movement of loose rock and soil, often shown by the downslope tilt of fences and walls
form where large volumes of rock fragments accumulate on mountain slopes and begin to move downhill
rapid flows of snow, ice, earth, and or rock masses
when rocks break loose and rapidly slip down to the base of the steep slope; common in mountainous areas
the rotational slip of a block of soil and rock along a concave surface; common in wet, clay soils
the rapid downhill slide of rock and soil down a steep slope triggered by an earthquake, undercutting by river, or glacial erosion.
a fan-shaped pile of rock fragments that accumulates at the base of steep slopes in mountain regions where frost shattering is common
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