processes Flashcards
hydraulic action (coastal)
pounding waves compress trapped air in the rocks creating an explosive blast which weakens and loosens rock fragments.
solution
carbonic acid/salts in sea water dissolves rock.
abrasion/corrosion (coastal)
rock fragments thrown against the headland break down the cliff face wearing away the rock.
hydraulic action (hydrosphere)
compresses air into the riverbank causing materials to be dislodged.
abrasion ( hydrosphere)
the force of water throws bedload against the bank causing a scouring action.
solution (hydrosphere)
when acids in the water react with soluble bedrock.
plucking
when ice freezes onto bedrock, pulling away loose rocks from the vallry side.
abrasion (glaciation)
amgular rock embedded in the ice grinds the valley floor.
freeze thaw weathering
when water in cracks in the rocks freezes, expands and contactd weakening the rock until rock fragments break off.
longshore drift
zig zag movement of the waves
swash
where waves push materials up the beach at an angle due to prevailing wind