Essential of Geology , 2 ed.

Essentials of Geology, 2e

Glossary

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zone of ablation
The area of a glacier in which ablation (melting, sublimation, calving) subtracts from the glacier.

zone of accumulation
(1) The layer of regolith in which new minerals precipitate out of water passing through, thus leaving behind a load of fine clay; (2) the area of a glacier in which snowfall adds to the glacier.

zone of aeration
Unsaturated zone.

zone of leaching
The layer of regolith in which water dissolves ions and picks up very fine clay; these materials are then carried downward by infiltrating water.

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