43 Cards in this Set
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Lateral Moraine
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Till deposits along the side margins of a glacier from depositional ridges
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Medial Moraine
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Two tributary glaciers flow together, their conjoining lateral moraines merge downstream
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End Moraine
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Accumulation of rocks and fine glacial material at the snout of a glacier
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Terminal Moraine
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End moraines that mark the farthest advance of a glacier
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Recessional Moraine
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End moraine deposited behind the terminal moraine, marking pauses in the retreat of a valley glacier or ice sheet
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Cirque
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Deep, sometimes steep-sided ampitheater formed at the head of an alpine valley by glacial ice erosion
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Glacier
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a mass of ice that is flowing as a plastic solid
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Alpine Glacier
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Glaciers fed by ice and snow in mountain areas, usually occupying valleys originally initiated by stream erosion.
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Cirque Glacier
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smallest type of glacier and most occupy cirques that formed when they were occupied by a larger alpine glacier
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Striation
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Gouges, grooves, and scratches produced in bedrock by rock fragments and boulders imbedded in a glacier
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Moraines
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Ridges formed along the margins of a glacier
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Arete
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jagged, sawtooth spine ro wall of rock seperating two expanding cirque basin.
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Acidic, Basic
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Water is _____
Limestone is ______
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Creep
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What is the slowest form of mass wasting?
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Landslide
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What is the fastest form of mass wasting?
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Creep
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Slow downslope movement of soil caused by the pull of gravity
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Landslide
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loose debris moving as a unit rapidly downslope
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Mass Wasting
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movement of surface materials downslope as a result of Earth gravitation
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Karst
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unique landform developed as a result of the dissolving of limestone by groundwater
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Inflitration
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Water seeping downward into the soil or other surface materials
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Weathering
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physical fragmentation and chemical decomposition of rocks and minerals in Earth's crust
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freeze-thaw weathering
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common in mountains and glacial environments, caused by the expansion of water as it freezes
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chemical weathering
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breakdown of rocks into smaller fragments through chemical processes that change the rocks' mineral composition
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mud-flow
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downslope movement of mud with mixing and tumbling as it moves
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subsurface water
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water that occurs below the surface of the earth
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infiltration
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water seeping downward into the soil or other surface materials
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percolation
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to pass through a porous substance or small holes; filter
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saturation
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point at which sufficient cooling has occurred so that an air mass contains the maximum amount of water vapor it can hold.
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groundwater
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all subsurface water, especially in the zone of saturation
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Physical Weathering
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Various surface processes that break rocks into smaller fragments without causing chemical changes
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Surface Runoff
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...
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Gully
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trench-like channels eroded by running water
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meandering Channel
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broad, sweeping bend in a river or stream
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Sheet Wash
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water that runs off over a surface rather than flowing in a channel
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Longitudinal Profile
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...
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Cut Bank
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...
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Oxbow Lake
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crescent-shaped lake or pond formed on a river floodplain in an abandoned meander channel
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Tributaries
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a stream or river that flows into another stream or river
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Drainage Basin
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Total land surface area drained by a stream system
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Natural Levee
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Banks of a stream or river that have been built up by flood deposits
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Floodplain
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area along a stream or river that is subject to flooding
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Braided Channel
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A Channel with multiple subchannels that form a braided pattern
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Drainage Pattern
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form of a channel network for a stream or river as viewed from a map perspective
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GEO 121: TEST 1