Crevasses A crevasse is a crack in the surface of a glacier. Photo by Kristina Ahlnas. A scientist climbing into a crevasse. Photo by Kristina Ahlnas. A ladder inside a crevasse. Photo by Kristina Ahlnas. A crevasse is a crack in the surface of a glacier caused by extensive stress within the ice. For example, … Continue reading Glacier Power – What are Crevasses?