Air bubbles trapped in glacier ice?

These photography were made while exploring the depth of Icelandic glaciers. On the South East Coast, there is places where the glaciers can be accessible and sometimes with ice cave allowing well equipped adventurers to explore inside of these frozen colossus. You can reach places where the ice can be around 100m thick. Glaciers are basically stacks of snow that got compressed over time from it's own weight, it's a very slow process taking many years. In the process, the air contained in the snow will get squeezed out but not completely, therefore some of the air will get trapped into the glacier and remain in it until the ice melts. Thanks to the power of modern photography we can captured these bubbles before they vanished forever and share their beauty with the world.