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Dolomitization: The process by which limestone is wholly or partly converted to dolomite rock or dolomitic limestone by the replacement of the original calcium carbonate (calcite) by magnesium carbonate (mineral dolomite), usually through the action of magnesium-bearing water (seawater or percolating meteoric water). (Definition from Jackson, J.A., ed., 1997, Glossary of geology [4th ed.]: Alexandria, Va., American Geological Institute, 769 p.)