COASTLINES Flashcards

1
Q

2 popular coastal human habitats

A

Barrier islands
River deltas

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2
Q

what’s a barrier island

A

long narrow sandy islands separated from the mainland by a narrow lagoon

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3
Q

3 kinds of continental margins due to continental movement

A
  1. Trailing edge, Passive, Atlantic Type
  2. Leading edge, Active, Pacific Type
  3. Transform margins
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4
Q

2 types of coasts

A
  • Primary– formed by land forces e.g. estuaries, Tectonic uplift coast, glacial, delta, lava coast
  • Secondary - shaped by sea forces e.g. Sandy barrier islands, Coral reef coasts, Swamp coasts (mangroves + salt marsh)
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5
Q

what happened during still stands between the glacial to interglacial periods

A

sea level remained relatively stable
- how our modern barrier islands formed
- Beach ridges formed, and then flooded
behind them

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6
Q

3 cause of sea level change

A
  • Ice (Glaciers on land) melting and running into the sea.
  • Water temperature rise - thermal expansion of sea water
  • subsidence or elevation of the land
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7
Q

whats the main problem for Florida & the Gulf Coast

A

sea level rise - we have a flat coastline

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8
Q

main ways Florida beaches are maintained due to them being critically eroded

A

re nourished by pumping offshore sand upon them + armoring

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9
Q

The response of a barrier island to rising SL

A

landward migration

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