Coasts: Coastal landscape development - Coastlines of Emergence and Submergence Flashcards
Coastal landscapes of emergence and submergence. Origin and development of associated landforms: - raised beaches - marine platforms - rias - fjords - dalmatian coasts
What landforms form on coastlines of emergence?
Raised beaches
Wave cut platforms
What are marine features that are left above the high tide level called?
Relict features
Give an example of a coastline of emergence and an associated landform there. in the UK
Arran, Scotland; King’s Cave
Why may raised beaches appear as grassy terraces?
Once above the high tide line they are subject to vegetation succession
What landforms form on coastlines of submergence?
Rias and fjords
Dalmatian coasts
Give an example of a coastline of emergence outside the UK.
Dyrholaey, Iceland
Give an example of a coastline of submergence and an associated landform there. in the UK
Mouth of River Exe, Exmouth; Ria
Give an example of a coastline of submergence and an associated landform there outside the UK
Sognefjord, Norway
What are rias?
Coastal inlets with steep coastlines
How do rias form?
Sea level rises relative to the land, flooding river valleys
How do fjords form?
Glaciers erode to create steep-sided U-shaped valleys.
Sea level rises relative to the land, flooding the glacial valleys.
Why are fjords often shallower at the mouth than further inland?
Glaciers can overdeepen their valley
How long is Sognefjord?
Over 200km
How do Dalmatian coasts form?
Sea level rises relative to the land.
River systems which once ran parallel to the coast are flooded.
What are Dalmatian coasts?
A series of long islands that were once hills along valley sides.
