Coastal Formations

Question 1

Geo

Answer 1

Narrow steep sided inlet
Cracks and joints are attacked by the sea, causing the cracks to widen

Question 2

Blowhole

Answer 2

Gap in the headland where sea water is pushed out
Formed when erosion is vertically upwards, and connects with weathered rock from the top of the cliff.

Question 3

Swash and drift aligned beaches

Answer 3

Swash aligned- sediment moves up and down the beach with little lateral transfer
Drift aligned- sediment is transferred along the coast by long shore drift

Question 4

Spits

Answer 4

Prevailing wind carries sediment along the coast, as the coastline changes direction the shingle becomes deposited, storms build up more material at the high water mark

Question 5

Barrier islands

Answer 5

Barrier islands have a series of dune ridges on their seaward face

Question 6

Barrier beach

Answer 6

A beach or spit extends across a bay to join two headlands, it forms a barrier beach.

Question 7

Ria

Answer 7

Sheltered winding inlets with irregular shorelines. Dendritic pattern, rias are deepest at the mouth.
River valleys are created in the interglacial period, when the ice melts, the valleys flood.

Question 8

Fjord

Answer 8

When glaciers advance down river valleys, they erode the sides and bottom of the valley, creating a v shaped valley. Glaciers bulldoze sediment down the coast, creating a threshold a ridge of sediment at the coast.

Question 9

Marine platform

Answer 9

The marine platform is rock ie and old wave cut platform

Question 10

Raised beach

Answer 10

Raised beach is formed of marine sediments deposited when sea levels were higher