Alabama critical minerals site name 'Unnamed occurrence,' GSA internal feature identification number ALMIN.07.20.003, located in the Ridgeville 7.5' quadrangle in Butler County, Alabama. This site has been documented to contain the commodity(ies) aluminum (aluminum oxide), calcium (calcium carbonate), iron (iron oxide), magnesium (magnesium carbonate), silica (silicon dioxide). 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: Smith, W.E., 1966, Limestone in Clarke, O.M., Jr., Smith, W.E., and Szabo, M.W., Mineral resources of Butler County, Alabama: Alabama Geological Survey Special Map 42, plate. Additional notes: No production [...]