Processes of glacial deposition - Glacial deposition from debris-rich glacier ice Flashcards

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1
Q

Describe the material that is deposited by a glacier?

A

Glaciers carry a wide range of particle sizes. The resulting deposits contain a mix of larger clasts (boulders, cobbles and pebbles) and finer material (sand, silt and clay).

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2
Q

Give three examples of larger clasts that are deposited by the glacier?

A
  • Boulders
  • Cobbles
  • Pebbles
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3
Q

Give three examples of finer material that is deposited by the glacier?

A
  • Sand
  • Silt
  • Clay
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4
Q

What is deposited material referred to as?

A

Once deposited, material is referred to as till.

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5
Q

How can tills be subdivided?

A

Tills may be subdivided based on the typical processes assumed to have been dominant in their formation.

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6
Q

When does deposition occur?

A

Deposition occurs when rock debris is released from ice and is no longer being actively transported.

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7
Q

What are the main processes by which glaciers deposit material?

A
  • Ablation
  • Lodgement,
  • Deformation
  • Flow
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