Grand Geyser, Yellowstone
Grand Geyser, Yellowstone.
Temperature: 201°F. Interval: 6-15 hours. Duration: 9-16 minutes. Height: 140-200 feet.
"The power and spectacle of a Grand Geyser eruption inspired the name given by the 1871 Hayden Expedition. It is one of the few major geysers that has not changed considerably since its early discovery. This fountain-type geyser erupts from a shallow basin which slowly fills with water over a 5 hour period."