Glacier

**Glaciers** rare masses of fallen snow, which has accumulated and compressed into a thick ice layer. Snow gathers at the accumulation area, turning into ice. Weight is rising, causing glaciers to deform in process and forcing it to move downhill. In ablation area ice begins to melt and evaporate. Equilibrium is reached between those areas if melted snow equals snowfall. Any disequilibrium causes the glacier to advance in faster rate. Locations, where the movement is rapid, giant openings, **crevasse** occur, which may dangerously travel across glacier. **Moraine** refers to moving of rocky debris, which create belts of visible debris on top and edges of glacier. While **medial moraine** moves down the glacier, **lateral moraine** moves alongside and **terminal moraine** can be located at snout or terminus of glacier.