a bunch of umbrellas that are outside in the rain

These are methane bubbles trapped in ice. I only heard about this recently and decided to go see them at Abraham Lake near the Banff National Park border. So three hours later, I was there marching out to the middle of the lake trying to find a clearing in the snow when at last I came upon this window into the lake. I could only imagine these bubbles coming to the surface in spring, and if someone isn’t careful, these can be set on fire!!