3.5 Coastal Transport And Deposition

Question 1

Lateral shift

Answer 1

The net movement of sediment up and down the beach

Question 2

4 marine sediment transportation methods

Answer 2

Traction
Saltation
Suspension
Solution

Question 3

Traction

Answer 3

Relatively large and heavy rocks rolling along the seabed

Question 4

Saltation

Answer 4

Smaller lighter rocks bounce along the seabed

Question 5

Suspension

Answer 5

Lighter sediment carried in waves

Question 6

Solution

Answer 6

Sediment that is dissolved moving in the waves

Question 7

Spit

Answer 7

Long narrow feature made of sand or shingle. Extends from land to sea. Caused by longshore drift, conjoined with a change in direction of water eg. A river estuary.

Question 8

2 types of beaches

Answer 8

Swash-aligned and drift-aligned beaches.
Swash-aligned: sediment moves up and down the beach with little lateral transfer.
Drift-aligned: sediment transferred along the coast due to longshore drift

Question 9

Offshore bars

Answer 9

Aka sandbars. Submerged/partially exposed ridges of sand or coarse sediment. Created by offshore waves and destructive waves eroding the beach and depositing it offshore.

Question 10

Barrier beaches/bars

Answer 10

When a beach/spit extends across a bay to join two headlands

Question 11

Barrier island

Answer 11

Occurs when a beach becomes separated from the mainland

Question 12

Tombolo

Answer 12

Beach forming a connection between a small island and the mainland.

Question 13

Cuspate foreland

Answer 13

Triangular-shaped headland. Occurs when longshore drift occurs from both directions of a coast.

Question 14

Pioneer species

Answer 14

First colonising plants of a dune

Question 15

Plant succession timeline

Answer 15

Embryo dunes, fore-dunes, yellow dunes, grey dunes, dune slack, mature dunes

Question 16

Halophyte

Answer 16

Salt tolerant plant species

Question 17

Sediment budget

Answer 17

Amount of sediment available within a sediment cell