Alabama critical minerals site name 'Unnamed occurrence,' GSA internal feature identification number ALMIN.42.20.003, located in the Elkmont 7.5' quadrangle in Limestone County, Alabama. This site has been documented to contain the commodity(ies) aluminum (aluminum oxide), calcium (calcium carbonate), iron (iron oxide), magnesium (magnesium carbonate), potassium (potassium oxide), silica (silicon dioxide), sodium (sodium oxide). 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: Daniel, T.W., Jr., 1976, The mineral resources of Limestone County, Alabama: Alabama Geological Survey Special Map 154, p. 4. Beg, M.A., 1984, Limestone [...]