The Constant and the Black Growler, Norris Geyser Basin, Yellowstone Park, 1908-1909

Yellowstone National Park, established 1872, was America's first national park. At the intersection of three major earthquake fault zones, Norris is the hottest, most active geyser basin in the park. Early on, Constant Geyser, left, sprayed twenty to thirty feet high in few-second bursts. Black Growler, right, was a steam vent--a cluster of hissing holes in a barren hillside.