Action Of Glacier | Related Terms, Erosion Processes & Deposition Features

Glacial activity plays a crucial role in the processes of erosion, transportation, and deposition, particularly in temperate or mountainous regions. Glacier-Related Terms Ice: Solidified water resulting from temperatures below 0°C. Snow: Frozen water vapour crystallizing and falling from the atmosphere. Snow-Line: The lower limit of snow cover on a mountain. Glacier: Moving ice, a substantial […]

Glacial activity plays a crucial role in the processes of erosion, transportation, and deposition, particularly in temperate or mountainous regions.

Glacier-Related Terms

  1. Ice: Solidified water resulting from temperatures below 0°C.
  2. Snow: Frozen water vapour crystallizing and falling from the atmosphere.
  3. Snow-Line: The lower limit of snow cover on a mountain.
  4. Glacier: Moving ice, a substantial accumulation of ice in motion.
  5. Glaciation: The erosion of the Earth’s surface by glaciers.
  6. Snow Field: A region permanently covered by snow.

 

Glacier Erosion Processes

  1. Sapping: Breaking up rock through alternating freezing and thawing of water in cracks.
  2. Plucking: Tearing away rocks frozen on the sides or bottom of a glacier.
  3. Abrasion: Wearing away rocks beneath a glacier due to embedded rocks’ scouring action.

 

Glacial Deposition Features In Lowland Areas

  1. Boulder Clay: Mass of sand and clay containing stones of various sizes.
  2. Erratics: Transported rock fragments with compositions different from the local bedrock, deposited as ice carrying them melts into water.
  3. Drumlins: Composed mainly of boulder clay.
  4. Eskers: Long, narrow ridges of sand and gravel deposited by melting water, typically porous.
  5. Terminal Moraines: Boulders deposited at the edge of the ice sheet.
  6. Outwash Plain: A large area of sand and gravel washed down from mountainous zones and deposited beyond terminal moraines.

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