1.1.7: characteristics + formation of coastal depositional landforms

Question 1

Beach are what type of landform

Answer 1

dynamic landforms

Question 2

Main influences on beach construction

3

Answer 2

sediment supply
wave energy
wave direction

Question 3

Main types of beach

3

Answer 3

swash-aligned
drift-aligned
zeta-formed

Question 4

Swash-aligned beach

Answer 4

Waves break parallel to the shore and sediment moves onshore/offshore

Question 5

Drift-aligned beach

Answer 5

Waves break at an oblique angle to the shore and longshore drift occurs along the shore

Question 6

Zeta-formed beach

Answer 6

Waves break at an oblique angle but a headland at each end causes wave refraction, blocking sediment movement, longshore drift along coast and sediment builds up in front of a headland

Question 7

Spit

Answer 7

A linear ridge of sediment joined to the land at one end

Question 8

Distal end and proximal end of spits

Answer 8

The distal end of a spit lies in open water and the proximal end is joined to the mainland

Question 9

Bar

Answer 9

A bar forms when a spit grows to form a ridge that blocks off a bay and creates a lagoon or begins as deposits out at sea

Question 10

Barrier island

Answer 10

A bar not connected to the mainland

Question 11

Tombolo

Answer 11

A spit or bar that joins the mainland to an island

Question 12

Cuspate foreland

Answer 12

A triangular-shaped projection from the shoreline made up of a series of ridges created by longshore drift from opposing directions