| Dolerite dykes that cut the peridotite show chilled margins and local metasomatic calcic alteration. |
| The boundary between the sheeted dykes and pillow lavas is tectonic, and because of shearing, the pillow basalts are locally poorly preserved. |
| A tholeiitic suite of dolerite dykes in the southwestern Borrowdale Volcanic Group is a separate, later magmatic event. |
| A stockwork of dykes of mainly jotunitic composition crosscuts the anorthosite bodies and the lopolith. |
| Within the Grenville basement these are represented by alkalic to tholeiitic mafic dykes and alkalic to peralkaline granite plutons. |
| To explore this possibility both the anisotropy of susceptibility and the anisotropy of magnetic remanence of the dykes were measured. |
