Flamborough Head Flashcards

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1
Q

distance and subsection of coastline

A

60km and 1d

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2
Q

what type of rock strata

A

discordant

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3
Q

what is flamborough head

A

chalk headland

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4
Q

how fast does soft rock erode

A

shale = 1.8m/yr

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5
Q

how fast does hard rock erode

A

limestone = 0.1m/yr

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6
Q

fetch

A

1500km

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7
Q

lsd direction

A

north to south

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8
Q

features of cliffs at flam and changes over time

A

-chalk
- 20/30m
- the top of the cliff is made of till deposited from glacial period (18,000 years ago) and has been eroded by mass movement to 40 degrees.
- the cliff will collapse over a long time period

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9
Q

example of a bay

A

filey bay

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10
Q

when were rocks formed

A

jurassic period

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11
Q

sources of sediment

A
  • river esk - minimal amount (highly managed)
  • erosion of chalk, limestone and shale cliffs
  • material moved onshore at last ice age
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12
Q

physical factors

A

sources of sediment
wave energy
geology

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13
Q

example of shore platform

A

robin hoods bay

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14
Q

example of stacks

A

green stacks pinnacle

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15
Q

example of geo

A

huntsmans leap

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16
Q

peak wave height

A

4m

17
Q

examples of inter-relations

A
  • headland and bay - Filey brigg and Filey bay
  • rivers and landforms - river esk and Robbin hoods bay
  • sediment supply from north to south through lsd - saltburn to Filey bay
  • wave cut platform and cliffs - Robbin hoods bay - when long enough it can stop erosion - flat (3 degrees) but more effective at low tide than high tide
18
Q

short term changes at flamborough head

A
  • cliff collapse but caused by long term erosion
    seasonal:
  • increased precipitation = increased sediment in winter
  • beach profile goes in summer = wider and higher
  • more storms = wind and wave energy increase in winter
19
Q

long term changes at flamborough head

A
  • offshore sediment bought up over 9000 years (flandrian transgression)
  • wave cut platforms - eroded over millennia
  • sediment from jurassic period
  • end of glacial maximum (15,000 years ago) - till deposited on coastline
  • erosion of arch - stack - stump as chalk 0.1m/yr