Flashcards in Distinctive Landscape Deck (16):
A geomorphic process involving the breakdown of material through water (ocean or rivers)
A geomorphic process which involves the breakdown of materials through atmospheric and biological actions
Freeze thaw action:
cracks in rocks fill with water that freezes at night,
ice expands by 9% causing pressure on rock. cracks get bigger and the cycle continues
water reacts with certain minerals. minerals are weakened when exposed to air (oxidation). rocks like chalk and limestone, are affected by solutions
Rocks and land on coast broken down by living organisms, plants and animals.They make cracks which water can then penetrate.
4 types of erosion
water enters cracks in bank and compresses air, when water levels reduce the air expands causing a mini explosion.
Bank or channel is worn down by materials carried by the river flow like rocks and stones
Rocks and stones bump into each other, smoothed down and into smaller pieces
Chemical breakdown of rock
acids from rain dissolve rocks on bank surface.
4 transportation of sediment
Large boulders and rocks carried along river bed by water flow, scraping floor as they do so.
Small pebbles and stones bounce along bed in small jumps
Very fine material carried by water flow. Water appears murky
Some types of sediment like minerals are dissolved in water and carried along in solution