Glacial Formations

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Striations

Chatter Marks
  • Show direction of glacier movement
  • Ice passes over resistant rock, localised pressure melting on the up-valley side
  • The area is smoothed by and streamlined by abrasion
  • Striations are grooves or scratches made by subglacial material
  • Grooves in the resistant rock because there is more meltwater, meaning material has more movement within the glacier

Kame deltas

Eskers
  • Material deposited at the edge of a glacier
  • Form when meltwater from the base of a glacier deposits material
  • Looks the same as a medial morraine, however eskers have stratified layers unlike morraines

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