Glacier

A glacier (US: ; UK: or ) is a persistent body of dense ice, a form of rock, that is constantly moving downhill under its own weight. A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries. It acquires distinguishing features, such as crevasses and seracs, as it slowly flows and deforms under stresses induced by its weight.

Extends: Glaciology, Glaciers, [Bodies of ice](https://wikipedia.org.ai/Bodies of ice), [Montane ecology](https://wikipedia.org.ai/Montane ecology), [Water ice](https://wikipedia.org.ai/Water ice)