Dieudonné Sylvain Guy Tancrède de Gratet de Dolomieu usually known as Déodat de Dolomieu (23 June 1750 – 28 November 1801) was a French geologist. The mineral and the rock dolomite and the largest summital crater on the Piton de la Fournaise volcano were named after him.

The Dolomie de Fiennes is a geologic formation in France. It preserves fossils dating back to the Devonian period.