Crystal Geyser

Crystal Geyser is located on the east bank of the Green River approximately 7 km downstream from Green River, in Utah, in the United States. Unlike most geysers that spew hot water, Crystal Geyser is a cold geyser. Cold water geysers erupt due to continual buildup of carbon dioxide in the water, and the eruptions are like a shaken soda can being opened. Cold water geysers are much less common than the geothermal variety, and an artificially created cold geyser is even rarer. The geyser was created in 1936 when an exploratory oil well was drilled to a depth of 800 m and unknowingly tapped into a carbon dioxide charged aquifer at around 215 m. Since then the geyser has been periodically erupting while expelling large quantities of carbon dioxide and travertine-depositing water. It erupts every 8 to 22 hours sometimes as long as 30 minutes. The water can shoot up as high as 40 m, but these days the eruptions are less than 6 m high. Researchers studying the geyser believe it's been partially plugged by people throwing rocks into the hole who believe that doing so could trigger the geyser.