Field name: Dolerite, N margin of large intrusion. Thin section: coarse-grained (<2 mm) crystalline igneous rock, now highly altered/metamorphosed now comprises mainly chlorite, sericite and Fe-oxides, uncommon relict feldspar
Locality details
900 m 359 deg from Waen Fechan. 4.45 Km SW of Dolgellau Bridge (S End)