Photo by @shonephoto (Robbie Shone) - The four light coloured pyramids in the foreground are lake sediments around the shore of Centrum Sø. They reach many 10s of meters above the current lake level, indicating that the level of the lake was once much higher than it is today. Photograph from a recent expedition, sponsored by the National Geographic Committee for Research and Exploration to construct the first record of past climate change from caves in Greenland. by natgeo

via Instagram http://ift.tt/1LJrtQr