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11 Cards in this Set

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  • Back
What is a hanging valley, and how is it formed?
Valleys of tributary streams, which are left high up on sides of main valley, as their glaciers are smaller and therefore has less eroosive power. Found when rate of abrasion is slower, so less deep than main valley
How is a corrie formed?
Under high pressure, snow melted to ice in cracks, plucking forms steep back wall. Abrasion shapes bottom of hollow. Ice moves down to gravity, but moveemnt slows down, and rock lip is formed, which is (ridge od solif rock) This increases by increase in deposotion of rock material
How is a U-shaped valley formed?
formed by valley glaciers. As glacier moves, it has large erosive power, nd destroys waterfalls/interlocking spurs forming truncated spurs, left high up on valley sides. Erosional process involved are plucking and abrasion, leaving a wide, flat, U-Shaped lorr, and steep valley sides
How was an arete formed?
2 corries form beside each other on mountinside, forming a teep knife-edge ridge, which is continbually attacked by freeze thaw action, to make it steeper
How is a wave cut notuch formed?
Hydraulic acton/avrasion erode bottom of cliff forming wave cut notch. Eventually overhang will devvelop which will be weathered by solution/biological weathering . will collapse due to gravity, remians of cliff form the rocky wave cut platofrm, visible at low ride. Continual erosion/weathering, means cliff retreats, becoming higher and steeper. As width of plafotm increases, opwer of sea decreases, as rivwer has further to travel, and is shallower, causing more friction.
How is delta formed?
2 types: birds foot (fine sedinemnts) arcuate (coarse) Areas of low lat land, when river meets sea. As river meets sea, loses velocity, causing it to drop some of its load. River has to split to go around blocked channels forming distrubaries
Whta is floodplain?
area of flat land on either side of river. If river is carrying too much water, wiull flood surrounding area, and deposit heaviest material first.
What is levee?
When flooding occurs, heaviest load is deposited forming banks, to help conrtain river in its channel
How is meander formed?
fastest flow of water occurs on outside of bend, as river is deepest therefore greates erosion, and material deposited on slip off slope. Continual erosion occurs, and ends move closer, and when flooding occurs, river will take straightest route and cut across. continual deposition on edges of bend may result in an oxbow lake forming
how is stump formed?
sea erodes fault with hydraulic action. as water retreats, presure release breaking off rock. crack bgger, cave. collapse due to gravity. weathering ontop stump
What is headland?
occur on coastlines where hard/soft rocks are found at 90 degrees to sea. soft reodes quicker, forming bays. erosion greatest at headlands, as moer exposed, and bay have retreatred. sea not as poeful in bays because it is shallower, and starts to deposit material