Kintale Marble

Notes:

The Culdaff Limestone Formation comprises dark grey marble with large black dolomite crystals interbedded with graphitic pelitic schists. "Clusters of whitish veins of calcite and large black dolomite crystals forming polygonal patterns were much studied and believed to be Ordovician and Silurian corals. McCaillien (1935) favoured an inorganic origin, possibly modified by deformation" (GSI)."A mile and a half northward of Rathmullen, on Lough Swilly. Bluish-grey, in part earthy and in part micaceous. Works easily; can be raised in large blocks. One black bed has been locally used as a marble" (Kinahan 1889, p. 171).