coastal erosion

coastal erosion - Transcript

Geo g ra p hy Geo

Old cliff line

Original Land su

rface
stack stump

Natural Arch

Wave cut platform

Tom Abbott Biddulph High School and made available through www sln org uk geography and only for non commercial use in schools

Cliff line

Geo g ra p hy

Joints and beds allow waves to attack the cliff more easily

HIGH TIDE LEVEL
Waves can use rocks to erode the cliff

Wave cut platform

Tom Abbott Biddulph High School and made available through www sln org uk geography and only for non commercial use in schools

Wave cut notch

Groynes

Sediment accumulation due to Longshore Drift

Geo g ra p hy

Waves approach beach at oblique angle
Tom Abbott Biddulph High School and made available through www sln org uk geography and only for non commercial use in schools

Geo g ra p hy

Wave cut platform

Wave built terrace

Ouch

large angular rocks

rocks and pebbles

soft sand

Tom Abbott Biddulph High School and made available through www sln org uk geography and only for non commercial use in schools

Geo g ra p hy

The force of the waves pushes air into cracks in the rock

The compressed air exerts enormous pressure at the tip of the crack As the water falls back the air pressure is released Abbott rock isHigh School and made available throughfurther enlarging the hole and Biddulph pulled out from the crack Tom
www sln org uk geography and only for non commercial use in schools

Constructive Waves

Geo g ra p hy

Spilling Breaker

Weak Backwash

Powerful Swash

Tom Abbott Biddulph High School and made available through www sln org uk geography and only for non commercial use in schools

Constructive Waves

Geo g ra p hy

Crashing breaker

sh ul Backwa Powerf
Tom Abbott Biddulph High School and made available through www sln org uk geography and only for non commercial use in schools

h Weak swas