EARTH 10 Lecture Notes - Lecture 11: Glacier Terminus, Ice Shelf, Headwall
Document Summary
Advance and retreat applies to terminus and snout. If in equilibrium, neither advances nor retreats nut is still moving ; eroding bedrock. Accumulations : mass/quantity of something that"s gradually been gathered or acquired. Zone of accumulation : snow and ice falls in winter > melts in summer. Ablation : remove snow/ice by melt or evaporate, typically from iceberg/glacier. Forms: melting, sublimation (solid to gas, atmosphere"s dry and cold), & calving (physical breakdown) Calving has breakage of icebergs into the lake/ocean new icebergs; dominant form in aa. Zone of ablation : snow and ice melts in summer > falls in winter. Alpine/cirque: in mountain ranges, high on mountain side, in bowls and cirques. Valley: alpine in a valley; valley walls restrict glacier flow. Cirque : semicircular hollows set in a mountain slope with a steep headwall and bounded on 4 sides. Tidewater: glaciers that terminate at the ocean rocky/dirty: ice-bound rock or rock on ice.
