Alabama critical minerals site name 'Unnamed occurrence,' GSA internal feature identification number ALMIN.58.20.031, located in the 7.5' quadrangle in Shelby County, Alabama. This site has been documented to contain the commodity(ies) aluminum (aluminum oxide), calcium (calcium oxide), barium (barium oxide), iron (iron oxide), magnesium (magnesium oxide), manganese (manganese oxide), silica (silicon dioxide), silica (disilicon trioxide). Was there past production of these minerals at this site?: No. The reference in which more information can be found on this site and its minerals can be found in: Tew, B.H., 1986, Mineral resources map of Shelby County, Alabama (Table 12): Alabama Geological Survey Special Map 171, p. 20. Additional [...]