Geography Flashcards

(44 cards)

1
Q

What is a coast?

A

Where the land meets the sea/ocean

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2
Q

What is geology?

A

The study of rocks including both lithology and geological structure

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3
Q

What is geological structure?

A

The arrangement of strata along a coastline layers

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4
Q

What 3 Main elements does geological structure contain?

A

Strata, Deformation, Faulting

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5
Q

What is Dip?

A

The angle of rock strata in relation to the horizontal in a cliff face

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6
Q

What is faulting?

A

Presence of major fractures that have moved rocks from their original positions

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7
Q

What are Joints?

A

Occur in most rocks often regular patterns dividing rock strata into blocks

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8
Q

What are fissures?

A

Much smaller cracks in rocks often centimetres that represent weaknesses erosion can exploit

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9
Q

What is lithology?

A

Different types of rocks and characteristics

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10
Q

What is coastal recession?

A

When the coast retreats due to erosion

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11
Q

What is a Psammosere?

A

A sand dune ecosystem found at low lying coastline at beaches

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12
Q

What is a Halosere?

A

A salt marsh ecosystem found at sheltered areas on a coastline

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13
Q

What is transportation?

A

The movement of sediment within the littoral zone

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14
Q

What is traction?

A

A large piece of sediment pushed along the seabed

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15
Q

What is saltation?

A

Small sediment is carried and bounces along the river/seabed

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16
Q

What is suspension?

A

Small sediment suspended and transported by the sea

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17
Q

What is solution?

A

Chemicals in the water dissolve sediment

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18
Q

What is current?

A

Current is the movement of any body of water in the coastal zone in a certain direction

19
Q

What is longshore drift?

A

The movement of sediment by backwash and prevailing wind causing backwash to be at an angle

20
Q

What is deposition?

A

The dropping of sediment that was carried by wind, waves, ice or flowing water

21
Q

What is marine erosion?

A

The breakdown and carrying of material by the sea

22
Q

What is Rock Strata?

A

The different layers of rock within an area

23
Q

How do plants stop coastal recession?

A

. Plant sediment binds sediment particles together making them harder to erode
. Submerged plants growing in sediment provide a protective layer
. Plants protect sediment from wind erosion reducing wind speed

24
Q

What kind of plants grow at the coast?

A

. Pioneer species
. Halophytes
. Xerophytes

25
What are Halophytes?
Plants that can tolerate salt water roots that are well adapted
26
What are Xerophytes?
Plants that can tolerate extremely dry conditions
27
Factors affecting transportation?
Sediment size, Wave energy, Current Strength, Length of fetch
28
What is weathering?
The breakdown of rocks in situ exploiting weaknesses over a long timespan
29
Different types of weathering?
Biological, Mechanical , Chemical
30
Types of Mass movement?
Rock Fall, Rotational Slumping, Mudflow, Landslide
31
What is sea level change?
Rise of fall in the level of the sea in comparison to the land
32
What is Isostatic change?
A local change in sea level due to land movement
33
What is Eustatic change?
The global change of sea level due to the change of volume in the water
34
What is a ria?
A flooded river valley
35
What is a fjord?
A flooded glacial valley
36
What is depression?
Large amounts of sediment weighing down the seabed
37
What is thermal expansion?
As sea water is heated the volume of water expands
38
When will coastal recession be slowest?
When there are resistant rocks with little mass movement
39
What is a storm surge?
When the surface water level rises due to significant low pressure
40
Ways a coastline can be protected?
Beach Nourishment, Sea wall, Cliff regeneration, Groynes, Offshore break waves, Rip rap, Sand dune regeneration
41
What is sustainable management?
A management strategy that will meet the needs of the present without compromising the needs of the future
42
What are the four main elements of sustainable management?
Environmental, Economic, Social, Political
43
What does SMP stand for?
Shoreline Management plan
44
What are examples of Submergent landforms?
Raised Beach , Stumps