Case study- Landforms Flashcards Preview

A2 Geography- Coasts > Case study- Landforms > Flashcards

Flashcards in Case study- Landforms Deck (27)
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1
Q

do discordant coastlines have more features than concordant ones?

A

yes

2
Q

give an example of a stack?

A

old harry, dorset

3
Q

give an example of a arch?

A

durdle door, Jurassic coastline, Dorset

4
Q

give an example of a bay?

A

lulworth cove, Jurassic coast, dorset

5
Q

what happened to old harrys wife?

A

was a stack but now is a stump

6
Q

what type of coastline is the jurassic coastline?

A

concordant

7
Q

what is the rock type at old harry?

A

chalk

8
Q

why is old harry particularly vulnerable to erosion?

A

it is located at a headland meaning that it is subject to wave refraction

9
Q

what do orthogonal lines show?

A

where energy is concentrated at a headland, enhancing its erosion

10
Q

what features are more prominent on concordant coastlines

A

wave cut notches and wave cut platforms

11
Q

where is an example of a wave cut platform?

A

flamborough head

12
Q

give an example of a bar?

A

slapton sands

13
Q

give an example of a tombolo?

A

st. Micheals mount

14
Q

give an example of an area of sand dunes

A

Holkon, Norfolk

15
Q

give an example of a spit

A

Spurn spit

16
Q

give an example of a estuary

A

humber estuary

17
Q

what is a cuspate foreland?

A

triangular beach due to longshore drift operating on a coastline from two different directions. two sets of storm waves build up a series of ridges, each protecting the material behind it creating the triangular feature

18
Q

give an example of a cuspate foreland

A

Dungeness, kent

19
Q

what is the name for a salt tolerent plant?

A

halophytic

20
Q

what is a berm?

A

long ridges of sand/shingles that run parallel with the shoreline

21
Q

how are salt marshes formed?

A

1) A thin layer of mud forms over the sand which is cover at each tide. this is due to FLOCCULATION, where negatively charged clay particles which are neutalised in salt water clump together and therefore become too heavy to be carried in suspension and are deposited.
2) More mud is deposited and the first plants appear. these plants trap more mud and silt. Channels are cut in the marsh when the high tide recedes
3) Further plants appear higher up the marsh which accelerates mud accretion. Marsh surface rises and channels deepen
4) the mud becomes even more deeper and further plants colonise the higher zones. the marsh is fully covered in vegetation and eventually not even the high tide can flood the salt marsh

22
Q

how do sand dunes form?

A

1) first dunes to develop are when the sand it trapped in items toward the back of the beach eg rocks
2) Salt tolerant plant seeds are blown in from the sea and grow which traps more sand
3) water is more easily retained in the soil and so more plant species are encouraged to colonise the area
4) the further the dune is from the coast the less sand it receives so dune height becomes smaller

23
Q

what are dune slacks?

A

depressions in the dunes where the water table is on or near the surface and conditions are often damp leading to the growth of reeds

24
Q

what are blowouts?

A

wind is funneled through the dune system and removed the sand

25
Q

what happens if the rocks of a cliff dip seawards

A

creates a shallow cliff

26
Q

what happens if the rocks of a cliff dip in land?

A

steep cliffs

27
Q

give an example of a sediment cell?

A

Holderness coast