coastlines

• what is the coastline of emergence?


  when sea levels falls relative to the coast , a new coastline emerge from the sea
• examples of landforms at coastlines at emergence

  raised beaches

  wave-cut platforms

  relict cliffs
• named example of coastlines of emergence

  Isle of Arran in Scotland
• how are wave-cut platforms an example of landforms?

  when sea levels fall they're exposed , leaving them raised above their former level
• how do raised beaches form?

  when the fall in sea level leaves beaches above the high tide mark

  • over time beach sediment becomes vegetated and develops into soil
• what are relict cliffs?

  cliffs above raised beaches are no longer eroded by the sea and slowly get covered by vegetation

  • not uncommon to see wave-cut notches , caves , arches and stacks within relict cliffs
• what are coastlines of submergence?

  when sea level rises relative to the coast , the sea submerges (drowns) the existing coastline
• examples of a Dalmatian coast

  the Dalmation coast in Croatia
• examples of landforms at coastlines of submergence

  Rias

  Fjords

  Dalmatian Coastline
• rias are a flooded river valley

  • wide and deep at their mouth
  • become narrower and shallower the further inland they reach
• fjords are drowned glacial valleys

  • straight and narrow with steep sides
  • shallow mouth caused by a raised bit of ground , formed by deposition of material by glacier
  • deep further inland