📘 How a glacier flows downhill
Follow gravity, ice deformation, basal sliding, meltwater, crevasses, erosion, and mass balance.
What you’ll learn
- Accumulation
- Gravity
- Deformation
- Basal sliding
- Plastic flow
- Valley flow
- Meltwater
- Erosion
- Mass balance
- Conveyor
Questions this course answers
What drives glacier flow?
Gravity creates driving stress, resisted by bed and valley friction.
What are the two main movement mechanisms?
Glaciers flow through crystal deformation plus sliding or shearing at the base.
Why do crevasses form?
The upper, less-confined ice cracks under tensile strain.
What does glacier retreat mean?
Retreat describes front position when net mass loss exceeds supply.
How can meltwater affect sliding?
Subglacial water changes contact and pressure at the bed.
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