Dec. 2

From GeoClasses

Contents 1 Topics from chapter 21 1.1 Types of glaciers 1.2 glacier formation 1.3 how glaciers move 1.4 glacial landscapes 1.5 glacial deposits 1.6 permafrost 1.7 glaciations over geologic time

Topics from chapter 21

Types of glaciers

• valley glaciers (or alpine glaciers)
• continental glaciers (or ice sheet)
• ice shelves

glacier formation

• accumulation
• ablation (shrinkage)

how glaciers move

• plastic flow
• basal slip
  • see fig. 21.11
• valley glaciers are different
  • surge
  • crevasses
• ice streams

glacial landscapes

• striations
• cirques
• U-shaped valleys
• hanging valleys
• fjords

glacial deposits

• till
• outwash
• moraine
• drumlins
• kettles
  • see table 21.1
• varves
• eskers

permafrost

glaciations over geologic time

• Wisconsin glaciation
  • sea level change
  • see issue 21.1 (p. 524)
• Pleistocene glaciations