submergent/emergent landforms Flashcards

1
Q

how are raised beaches formed?

A
  • when the climate gets colder, sea levels decrease as water turns into ice
  • as sea levels drop, more coastline is revealed
  • original beaches are no longer eroded by waves
  • lower part of beach may experience marine erosion and a small cliff may form
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2
Q

what are fjords

A

submerged glacial valleys

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3
Q

how are fjords formed?

A
  • glaciers eroded below sea level

- when temperatures rose the ice melted and flooded the valley

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4
Q

three submergent landforms

A
  • fjords
  • dalmatian coasts
  • rias
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5
Q

three emergent landforms

A
  • raised beaches
  • relict/fossil cliffs
  • marine platforms/terraces
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6
Q

Relict/fossil cliffs

A
  • gently sloping, highly vegetated cliffs

- can often be seen that are no longer reached by the sea

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7
Q

where do dalmatian coasts form?

A

in areas where valleys are parallel to each other

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8
Q

how are dalmatian coasts formed?

A
  • when the valleys are flooded by sea level rise the tops of the valleys remain above the surface, creating a series of islands
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9
Q

what are raised beaches?

A

areas of former wave cut platforms and their beaches which are left at a higher level than the current coastline

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10
Q

what is a marine platform/terrace

A

a rock terrace formed where a sea cliff with a wave-cut-platform above it is raised above sea level

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11
Q

what are rias?

A

submerged river valleys, the lowest part of the course may be completely submerged while higher land could remain exposed

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