coastal Flashcards
hydralic action
when waves hit rock causig cracks
abrasion
waves picking up stones and hit against the cliff
attrition
pebbles carries by wave hit each other turning smoother
how is cave formed
when wave erode weakness in rock
arch formed
two caves erode back from eithier side of headland and meet in middle
what is longshore drift
wave approcah sea at angle. swash pushes sand up the beach then backwash carries sand back down to beach sand moves in zig zag way
how bar made
sand pebble move along coast by LD coastline changes direction and san builds up making spit then spit joins up with other coast
how lulworth cove formed
wave cut through limestone forms entrance to cove. wave erode soft band of clay quickly. erosion is inwards casuing shape wide
factors affecting coastlines
sea defences fetch
