mineral springs

high tap or mineral springs

Hochwasserhahn oder Mineralquellen

natural mineral springs

natürlichen Mineralquellen

Travertine is a form of limestone deposited by mineral springs, especially hot springs. Travertine often has a fibrous or concentric appearance and exists in white, tan, and cream-colored varieties. It is formed by a process of rapid precipitation of calcium carbonate, often at the mouth of a hot spring or in a limestone cave. In the latter, it can form stalactites, stalagmites, and other speleothems.

It is a component of the mineral natron and is found dissolved in many mineral springs.

== Vorkommen ==Natriumhydrogencarbonat kommt als natürliches Mineral Nahcolith in den Vereinigten Staaten vor.