Obscure dyke-like body c. 3 ft thick in no. 2 intrusion. Appears to be roofed by quartz-diorite and possibly also surrounded by it. ?Inclusion of pre-diorite dyke or post-diorite dyke that did not completely penetrate diorite. ?Appinitic lamprophyre
Locality details
Allt nan Slat, 1 mile S 13 deg E of Lianachan (house)