83-12349 - Stromatolites, one of the most ancient life forms on earth, mats of micro-organisms that become rock-like structures through accretion of calcium carbonate, in highly saline lagoons like here in Lake Thetis, Cervantes, Dandaragan Shire, Western Australia, Australia, Pacific
698-2302 - Eruption of Castle Geyser with thermophilic bacterica mats in foreground, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
312-1800 - Novice monk sitting on mat writing, Wat Jong Kham, thought to date from the 13th century, Kengtung (Kyaing Tong), Shan State, Myanmar (Burma), Asia