depostitional landforms Flashcards
what is the upper beach like
steep made of shingle
what is the lower beach like
gentle gradient made of mud and sand
what are runnels
disrupted by channels that drain water down the beach
what are cusps
semi-circular depressions formed when waves break directly onto the beach
what are ridges
form patterns In sand when sand is moved by waves
what are berms
mark the lower high tide which is formed by swash during high tide
what are spits
attached to land at one end and ends in the sea/river
what is a common characteristic of spits
a hooked/curved edge
what are the 4 flavourable condtions needed for spits to form
- bend/change in direction of coast
- constructive waves
- LSD
- plentiful load
what are mudflats
where river meets the sea
when do bars occurr
when theres a change in direction but no river to break off the LSD
what is flocculation
individual clay particles aggregate together to form larger heavier particles that sink to the river bed making them hard to move
when do mudflats become salt marshes
when salt and fresh water meet in an estury in sheltered areas
why is Morecombe bay famous
it has 4 river estuaries
what are tombolas
where a spit joins an island to a maninland
