cone geyser

A geyser is a hot spring that intermittently spouts jets of steam and hot water. Geysers are typically found in areas with recent volcanic activity, where underground water is heated by magma. The spouting action occurs when pressure confining near-boiling water in deep, narrow underground conduits is suddenly released.123

Cone geysers, like the famous Old Faithful in Yellowstone National Park, are visible as mounds of siliceous sinter (geyserite) on the surface. Old Faithful erupts with steam and hot water, reaching heights of about 130-140 feet (40-43 meters). The duration of its eruptions influences the interval until the next one. Geysers are rare, with Yellowstone National Park hosting approximately half of the world's total.431