Coastal landforms Flashcards
Headland erosion
Headland eroded by natural processes Forms fissure known as geo Geo expand can into blowhole Geo can expand into cave Cave breaks down into arch Arch breaks down to stack Stack breaks down to stump Sediment forms wave cut platform
Beaches
Commonly found in bays
Depositional landform
Made of sand or shingle
Swash aligned or drift aligned
Storm beach
A ridge marking the level at which pebbles are pushed to during highest spring tides
Beach cusp
Crescent shaped augments on shingle ridges
Berms
Lower ridges parallel to the storm beach
Mark successive levels
Shows where material gets pushed to during storms at high tide
Spit
LSD deposits sediment at a break in coast
More deposition forms bigger spit
Changed wind direction form recurved end
Salt marsh forms behind spit
Swash aligned beach
Closed system
Unaffected by LSD
Drift aligned beach
Open system
Affected by LSD
Can form spits, bars, tombolos
Tombolo
Spit that connects island with mainland
Coastal bar
Spit that connects back up with mainland
Eg. forms across bay, saltmarsh forms in bay
Depositional landforms
Beach cusps Storm beach Berms Bars Spits Tombolos
Erosional landforms
Bays Headlands Geos Blowholes Caves Arches Stacks Stumps
Sand dunes
Example of succession Psamuosere Pioneer species marram grass Embryo dune grows to foredune Foredune grows to yellow dune Yellow dune grows to grey dune Can have dune slack after grey dune Mature dune grows from yellow dune Need large supply of sand and prevailing winds
