Ключевые слова: america, basaltic, basin, circle, color, colors, deep, formations, geological, geology, geyser, geysers, hazards, horizontal, hot, hydrothermal, lake, land, lava, lavas, national, natural, nature, plateau, pond, pool, rocks, smoke, soil, steam, steaming, supervolcano, thumb, toxic, travertine, usa, volcanism, volcano, water, wyoming, yellowstone,