COASTLINES Flashcards
1
Q
2 popular coastal human habitats
A
Barrier islands
River deltas
2
Q
what’s a barrier island
A
long narrow sandy islands separated from the mainland by a narrow lagoon
3
Q
3 kinds of continental margins due to continental movement
A
- Trailing edge, Passive, Atlantic Type
- Leading edge, Active, Pacific Type
- Transform margins
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)
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
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 / elevation of the land
7
Q
whats the main problem for Florida & the Gulf Coast
A
sea level rise - we have a flat coastline
8
Q
main ways Florida beaches are maintained due to them being critically eroded
A
re nourished by pumping offshore sand upon them + armoring
9
Q
The response of a barrier island to rising SL
A
landward migration
