Fig. 42. Petrological map of the Loch Doon pluton, showing the main zones (after Stephens, 1997, and based on map from Gardiner and Reynolds, 1932). Granite (yellow); rocks transitional between granite and tonalite (orange); tonalite (green); rocks transitional between tonalite and norite (black); norite (blue); Ordovician (stippled).