Paleohydrology of ancient dolomites; geochemical evidence

Holocene and Pleistocene dolomite of Jamaica, Eocene dolomite of Egypt, and Ordovician dolomite of northern Canada all indicate dolomitization resulting from early meteoric influx into marine carbonate deposits. Dolomitization by meteoric-sea water mixing may be volumetrically the dominant diagenetic process by which early carbonate sediments become dolomitized. Dolomitized sediments, in some cases, retain chemical evidence of former directions of fluid movement.