Galena, Alaska located on the Yukon River between the Koyukuk River and the Nowitna River. Galena was established in 1918 near an Athabascan fish camp called Henry's Point. It became a supply and point for nearby lead ore mines that opened in 1918 and 1919. In 1941 and 1942, during World War II, a military air field was built adjacent to the civilian airport, and the two facilities shared the runway and flight line facilities. This air field was designated Galena Air Force Station shortly after the split of the United States Air Force from the United States Army, which occurred as
Mineral hydration Mineral hydration Mineral hydration is an inorganic chemical reaction where water is added to the crystal structure of a mineral, usually creating a new mineral, usually called a "hydrate". In geological terms, the process of mineral hydration is known as "retrograde alteration" and is a process occurring in retrograde metamorphism. It commonly accompanies metasomatism and is often a feature of wall rock alteration around ore bodies. Hydration of minerals occurs generally in concert with hydrothermal circulation which may be driven by tectonic or igneous activity. There are two main ways in which minerals hydrate. One is conversion of an oxide