Chapter 17.1

Chapter 17.1 - Chapter 17.1 Glacial Processes I.a....

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Chapter 17.1 Glacial Processes I.a. Glacier's mass budget consists of net gains or losses of glacial ice, which determine whether the glacier expands or retreats I.b. Formation of Glacial Ice I.a.i. Ice is both a mineral (an inorganic natural compound of specific chemical makeup and crystalline structure) and a rock (a mass of one or more minerals) I.a.ii. Increasing thickness of sedimentary layers results in increased weight and pressure on underlying ice I.a.i.1. Rain and summer snowmelt contributes water--> further melting--> meltwater seeps down into snowfield and refreezes I.a.i. In transition to glacial ice, snow becomes firn : has compact, granular texture I.a.ii. Snow/firn pressured and recrystallized into dense glacial ice I.a. Glacial Mass Balance I.a.i. Glacier is open system with inputs of snow and outputs of ice, meltwater, and water vapor I.a.ii. Accumulation zone feeds glacier's upper reaches with snowfall and other moisture, I.a.i.1. Area ends at the firn line : indicates where winter snow and
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Chapter 17.1 - Chapter 17.1 Glacial Processes I.a....

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