Geyser - A geyser is a hot spring of water superheated by magma.
Geysers are relatively rare geologic occurences.
Water recieved through the hydrologic cycle is pulled underground by means of gravity. It then encounters heat from amgma bodies close by. Once some of the heat is absorbed the geyser can begin to erupt. At Yellowstone National park beneath the Norris Geyser Basin about 332m, water was still liquid at the temperature of 241 degrees celcius. The reason the water can remain a liquid at such high temperatures is because of the extreme amounts of pressure at that depth.