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Limestone and Chalk. Limestone is a sedimentary rock consisting principally of the mineral calcite (calcium carbonate) and is widely distributed in Alabama. The limestones of Alabama have a wide variety of chemical and physical properties and have been used for various purposes throughout human history in the region.
BACKGROUND: The primary mineral in limestone is calcite or calcium carbonate ( CaCO3). When carbon dioxide ( CO2 ) reacts with water, carbonic acid is produced, see BUBBLES IN YOUR. WATER ACTIVITY. When an acid, such as carbonic acid, reacts with limestone, the limestone.