Black PoolWest Thumb Geyser Basin, Yellowstone National Park, Wyoming, September 12, 20142014-09-12#5626Larry L. Jackson
Thermophile MatsBlack Pool, West Thumb Geyser Basin, Yellowstone National Park, Wyoming, September 12, 20142014-09-12#5627Larry L. Jackson
Thumb GeyserWest Thumb Geyser Basin, Yellowstone National Park, Wyoming, September 12, 20142014-09-12#5642Larry L. Jackson
Ledge SpringWest Thumb Geyser Basin, Yellowstone National Park, Wyoming, September 12, 20142014-09-12#5644Larry L. Jackson
Collapsing PoolWest Thumb Geyser Basin, Yellowstone National Park, Wyoming, September 12, 20142014-09-12#5646Larry L. Jackson
Larry L. Jackson
San Angelo, TX
