English: Hot springs are sites where groundwater emerges at the Earth’s surface (or on the seafloor). Hot spring water has to be higher in temperature than the human body (an admittedly arbitrary definition): over 98° Fahrenheit or over 37° Celsius. Geysers are hot springs that episodically erupt columns of water. The highest concentration of geysers and hot springs anywhere is at the Yellowstone Hotspot Volcano in northwestern Wyoming, USA. Beryl Spring is located in Gibbon Canyon in Yellowstone’s Gibbon Geyser Basin. It has hot, aquamarine-colored water, hence the name “Beryl” (aquamarine is a bluish, gem-quality variety of the mineral beryl, Be3Al2Si6O18 - beryllium aluminosilicate). The pool has constant, energetic roiling and boiling, accompanied by significant overflow in a well-developed runoff channel. Behind Beryl Spring is a prominent, noisy fumarole that has been given the catalog designation GGCGNN073. Fumaroles are hot steam vents.