Photo of a blue ice crevasse in the Athabasca Glacier in Canada. Many crevasses or recent breaks in glaciers will display blue ice, as ice in the middle of the glacier is more dense. Glaciers and snow appear white because there are more air bubbles at its exposed and therefore warmer parts, and so the ice reflects the full spectrum of light. The blue color seen in deeper parts of glaciers occurrs because it is the only color not absorbed that deeply into the ice.
