Carbonatian is a term used to describe rocks that contain a high proportion of carbonate minerals, such as limestone or dolomite. Synonyms for carbonatian include calcareous, carbonaceous, carbonate-rich, or simply carbonated. These terms all refer to rocks that are composed of significant amounts of carbonates, with calcareous and carbonaceous typically used to describe sedimentary rocks that are primarily composed of calcite or organic matter, respectively. Carbonate-rich is a broader term that encompasses rocks with any significant proportion of carbonates, while carbonated is an informal synonym that evokes the fizziness of carbonated beverages, but is also used to describe rocks that contain significant amounts of carbonate minerals.