Gila River, Winkelman area, Gila & Pinal Cos., Arizona, USA

An occurrence 2 miles above Winkleman. NOTE: at this point the Gila River forms the county line between Gila and Pinal Counties; therefore, any such occurrence such as this evaporite, would reasonably occur on both sides of the river, as indicated by the literature.

References:
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 307.

Galbraith, F.W. & D.J. Brennan (1959), Minerals of Arizona: 56.