Fluvioglacial Erosion + Deposition landforms

Question 1

Fluvioglacial erosion + deposition landforms

Answer 1

• Meltwater channels
• Kames
• Eskers
• Outwash plains

Question 2

Fluvioglacial processes

Answer 2

• Meltwater
• Erosion
• Transportation
• Deposition

Question 3

Meltwater channels

Answer 3

• Melting of glacial ice forms meltwater streams
  = Deep troughs in landscape
• Erosive power = wide and deep
• Retreating glacier = deep meltwater channels are left with very shallow streams running through them.

Question 4

Kames

Answer 4

• Mounds of fluvioglacial deposits (sand +gravel) found on valley floor
• Meltwater streams on top of glacier collect in depressions and deposit layers of debris
• When glacier melts - debris is dumped on valley floor

Question 5

Kame terraces

Answer 5

• Piles of deposits left against valley wall by meltwater streams
• Look like lateral moraine - sorted into layers
• Meltwater streams deposit their heaviest load first and fine sediments on top

Question 6

Eskers

Answer 6

• Long, winding ridges of sand + gravel
• Deposited by meltwater - flow in same direction as glacier
• Deposited by meltwater streams flowing in tunnels under glacier
• Glacier retreats + stream dries up = load remains an esker
  = Show you where the glacial tunnel used to be

Question 7

Outwash plains/ Sandur

Answer 7

• Layer of gravel,sand and clay = in front of snout
• Meltwater flows out of glacier + carries sediment
• Sediment on outwash plains are sorted into layers
• 1st = Gravel - heaviest = bottom layer
• Last = Clay - carried furthest from snout