Keywords: stereoscopic stereophotography stereophotographs historical usgs history geology mapping black and white blackandwhite bnw stereograph blackandwhite monochrome surreal photo border black and white Yellowstone National Park, Wyoming. Castle Geyser in Upper Geyser Basin. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Yellowstone National Park, Wyoming. Castle Geyser in Upper Geyser Basin. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). |