Coasts Flashcards

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1
Q

What are the 4 types of coastal erosion?

A

Hydraulic action
Abrasion
Attrition
Solution

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2
Q

What is hydraulic action?

A

Hydraulic action is when the water hammers against the rock and water is forced into the cracks, breaking down the rock

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3
Q

What is Attrition?

A

Attrition is when rock are flung into each other, wearing each other away and making them rounded like pebbles.

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4
Q

What is abrasion?

A

When pebbles get flung against the rock, scraping and scouring it away.

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5
Q

What is solution?

A

When the water dissolves some materials.

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6
Q

What are the 3 coastal processes?

A

Erosion
Transportation
Deposition

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7
Q

What is erosion?

A

The wearing away of the coast

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8
Q

What is transportation?

A

The movement of material

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9
Q

What is deposition?

A

The dumping of material

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10
Q

What is longshore drift?

A

Longshore drift is when materials are moved along a beach by the waves moving at an angle in a swash and moving back at a 90° angle in a backwash therefore moving along the beach

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11
Q

What are the purpose of groynes?

A

Groynes are there to stop materials and things like boats from washing away. Their placement leads to starvation and accumulation.

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12
Q

What is starvation and accumulation?

A

Starvation accumulation is when longshore drift builds up materials on one side of the groyne ‘accumulating’ leaving the other side with nothing ‘starving’

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13
Q

What are the 6 types of erosional landforms?

A
Headlands
Bays 
Caves
Arches
Stacks 
Stumps
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14
Q

What is a headland?

A

A piece of land jutting out into the sea

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15
Q

What is a bay?

A

A broad coastal inlet often with the beach

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16
Q

How are caves formed?

A

Continue to corrasion will widen and deepen a wave cut notch into a cave.

17
Q

How are stumps formed?

A

The base of the stack will be continually attacked by the sea over time it may become unstable it will collapse and form a stump

18
Q

How are arches formed?

A

Went to caves are formed either side of the headland over time they may erode backwards and meet for an arch

19
Q

How are stacks formed?

A

Continued erosion of the base of an arch will make it unstable the roof will collapse into the sea forming a stack

20
Q

How are headlands and bays formed?

A

When the sea erodes the coast and some rock is stronger than the other the sea will wear away the soft rock (like sand or mud) forming a bay,leaving a headland made of sturdier rock (like chalk)