Coastal Flashcards Preview

Geo - Key Words > Coastal > Flashcards

Flashcards in Coastal Deck (30):
1

Arch

When caves, which have developed on either side of a headland, join together they from a natural arch

2

Attrition

The process whereby rock particles wear down through collisions with other rock particles

3

Backwash

Water moves up a beach as a wave breaks. The return movement of the water back down the beach

Return of swash

4

It is a ridge of sand which forms across the mouth of a river. It is usually parallel to the coast

Bar

5

A wide indentation into the land by the sea, protected on each side by a headland.

Bay

6

Blow Hole

when a joint between sea cave and the land surface above the cave becomes enlarged and air can pass through it. When water flows into cave, air is expelled through the joint sometimes producing a spray

7

A weakness such as joint is enlarged by wave action, creating a cylindrical tunnel which follows the line of weakness

Cave

8

A steep and usually high, rock face found at the edge of the land where it meets the sea

Cliff

9

Cliff line

Identical to the coastline but consists of cliff rather than lower features

10

Coastline

The margin of the land

11

When a wave is able to run up the beach and drain back again before the next wave arrives. The swash is more powerful than the backwash so deposition can occur

Constructive wave

12

This is a form of wave erosion.
Pebbles and rocks are thrown against the cliff face by breaking waves which causes the undercutting of the cliff and it leads to the breakup of the cliff and the things being thrown at it

Corrasive Action

13

Destructive wave

When a wave is able to run up the beach but unable to drain back again before the next wave arrives, thus the backwash if the previous wave interferes with the swash, reducing efficiency

14

Emerged coast

Coastal areas which have become raised above current sea level.
Cause = isostatic adjustment

15

The mouth of a river where fresh water and sea water mix and tides have an effect.

Estuary

16

The distance is open water over which the wind can blow and form waves

Fetch

17

Headland

Areas of harder rocks tend to resist the erosive powers of the sea. The resulting area of land jutting out into the sea

18

Hydraulic action

When a wave breaks against a cliff it causes air to suddenly become compressed. As the water retreats the air is allowed to expand often explosively. Repetition can lead to break up of surrounding rock.

19

Lagoon

When a spit extends across the mouth of a river to the extent that it causes the river to become diverted along the coast, an area of water is created separated from the sea by a narrow strip of land

20

Solid matter carried by water.

Load

21

Longitudinal coast

Occurs when valleys parallel to the coast become flooded by sea, as the land becomes submerged, the ridges of land between the valleys become chain islands parallel to the new coast

22

Mud flats

Sloping coats where sediment can settle, can allow the build up of mud as a sheet.

23

Valleys flooded due to the submergence under the sea along a longitudinal coast

Sometimes called sounds

24

Spit

Longshore drift transports material along the coast. When yeh mouth of a river is encountered material starts to be deposited. This can result in a narrow ridge of material attached to the mainland at one end and ending at sea.

25

When a natural arch collapses, the remaining upright sections form ____ , isolates rocks sticking up out of the sea

Stacks

26

Submerged coastal

Coastal areas which have become lowered below current sea level.

27

The movement of water in a breaking wave as it moves up the beach

Swash

28

The daily lovely of the sea

Tides

29

A bar linking an island to the mainland

Tombolo

30

Wave-Cut platform

As cliffs become eroded down to beach level they appear to migrate inland. The remains of the former cliffs Forms a flat rock platform.