Basic Geyser Facts
Certain facts about geysers are basic, but still important to know.
There are approximately 1,000 geysers throughout the world and they are considered extremely rare features. Most of the world's geysers are located in Yellowstone National Park. The geysers in Yellowstone National Park were created long ago by volcanic eruption.
The name “geyser" originated in Iceland and in Icelandic it means “to gush or rush forth". The first geyser was discovered in Iceland in 1294 and called “The Great Geysir".
Many geysers erupt straight up into the air. However, some geysers, referred to as Ledge geysers, erupt out of a hillside at an angle.
Many geysers erupt due to the boiling of water. However, some geysers are powered by gas pressure and erupt from warm or cold springs.
Some geysers erupt at regular intervals and others only erupt on rare occasions. Only six of the geysers located in Yellowstone National Park erupt regularly and their eruptions are predicted by the park's rangers. These six geysers include Old Faithful, Great Fountain, Riverside, Castle, Daisy and Grand.
All hydrothermal features are called geysers once they erupt. Once a geyser has been named a geyser, it is always called a geyser even if they no longer erupt. Other hydrothermal features include mud pots, hot springs, and fumaroles. There is one significant difference between hot springs and geysers: steam and water cannot flow through the cracks in a geyser's rock because these cracks are too narrow.