River Landforms – Old Age Stage (Leaving Cert Geography): Flashcards
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Practise the cards
15 cards from this deck
Dominant process in river's old age stage
Dominant process in river's old age stage
Deposition
Levee
Levee
Natural ridge of sediment along river banks
Where heaviest sediment deposits in levee formation
Where heaviest sediment deposits in levee formation
Immediately next to riverbank
Back swamp
Back swamp
Waterlogged area behind levees on floodplain
Raised river channel
Raised river channel
River flows higher than surrounding floodplain
Oxbow lake
Oxbow lake
Curved water body cut off from main river channel
What cuts through meander neck to form oxbow lake
What cuts through meander neck to form oxbow lake
Fast-flowing floodwater during flooding
Meander scar / mort lake
Meander scar / mort lake
Dried-up remains of oxbow lake
Delta
Delta
Flat, triangular alluvium area at river mouth
Distributaries
Distributaries
Smaller channels river breaks into in delta
Most common type of marine delta
Most common type of marine delta
Arcuate delta
Example of arcuate delta
Example of arcuate delta
Nile Delta, Egypt
Example of bird's foot delta
Example of bird's foot delta
Mississippi Delta, USA
Bottomset beds in delta
Bottomset beds in delta
Fine sediment carried furthest into sea/lake
Foreset beds in delta
Foreset beds in delta
Coarse material deposited closer to river mouth