Dorset coastline

Question 1

Durdle door

Answer 1

Located on concordant coastline
50 metres wide made out of portland limestone
70 meter isthmus leading up to it of weal den clay
1 metre tidal range
61 metres high
offshore currents move rocks away
SW prevailing wind 7000 km fetch

Question 2

Lulworth cove

Answer 2

From back to sea it is made up of
Chalk(Hard)
greensands(soft)
wealden clay (soft)
purbeck limestone (hard)
portland limestone (hard )
formed by old river that ran throught that area causing weaknesses in rock
120 metre wide entrance
250 metre wide chalk backing
300-500 feet high cliffs
500 metres wide
SW prevailing wind 7000 km fetch

Question 3

How are landforms inter related on the Dorset coastline

Answer 3

Ballard down acts as a groyne LSD moves sediment north along the beach at Swanage and then Ballard down acts as a groyne trapping the sand on swanage beach
Erosion at bats head provides flints that build up west of durdle door that create a beach
Prevailing wind from south west means durdle door protects man o war rocks from waves slows erosion of man o war rocks

Question 4

Old harry dorset

Answer 4

Southern end of Studland bay
made from chalk
One of the 3 stacks(Old Harry)is 120 feet at all
Old Harrys wife collapsed 1896