Flashcards in Erosion Transportation And Deposition Deck (13):
What is hydraulic action?
When the force of the water breaks rock particles away from the river channel
What is abrasion?
When eroded rocks picked up by the river scrape and rub against the channel wearing it seat
Most common form of erosion
What it attrition?
Eroded rocks picked up by river smash into each other and break into smaller fragments (edges become rounded at they rub together?
What is solution?
When river water dissolved certain soft rocks like chalk and limestone
What is transportation?
The movement of eroded material
What it traction?
Large boulder like particles are pushed along river bed by force of water
What is saltation?
Pebble sized particles are bounded along the river bed by the force of water
What is suspension?
Small particles like silt and clay are carried along by the water
What is solution (transport?
When soluble materials dissolve in the water and are carried along
What is deposition?
When the river drops the eroded material it was transporting
When does a river deposit its load?
When it loses velocity
Why may a river slow down and deposit material?
The volume of water in river falls
The amount of eroded material in water increases
The water is shallower e.g. On inside bend
The river reaches its mouth