20070219_petermann_island_0011

A large iceberg which has rolled over many times showing striations etched in the berg caused from trapped air and waves. Blue icebergs aren't really blue. They're perfectly clear, which allows light to pass through. Since ice filters out all colors except blue, the iceberg emits blue light. Typically blue ones are very compressed originating from the bottom of a glacier. They can easily be 80,000 years old. Once they hit water they typically only last a few years.