Onsen Hana - Onsen

Japanese: 温泉華 - おんせんか

Also called "yu no hana" (flowers). Precipitates from hot spring water. After hot spring water comes to the surface, they are formed due to a drop in temperature and pressure, the loss of contained gases, chemical reactions with air and other substances, the action of bacteria, etc. Examples of these include flowers of sulfur, travertine (calcite or aragonite), siliceous stone (protein stone), sulfates such as gypsum, epidote, and beitolite, limonite (oxidation precipitate of iron bicarbonate), and sulphur (needle-shaped crystals formed by the action of hydrogen sulfide and hot spring clay).
→ Related article Kusatsu [town]

Source : Heibonsha Encyclopedia About MyPedia Information

Japanese:

湯のはな（花，華）とも。温泉水の沈殿物。温泉水が地表に出てから，温度・圧力の低下，含有ガスの逃失，空気その他との化学反応，バクテリアの作用などにより生ずる。硫黄華，石灰華（方解石かアラレ石），ケイ華（タンパク石），セッコウや緑礬(りょくばん)や北投石などの硫酸塩，褐鉄華（重炭酸鉄の酸化沈殿），毛礬（硫化水素と温泉粘土の作用でできる針状結晶）など。
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