Discussion on evidence for an unconformity at the base of the Eycott Volcanic Group

Millward & Molyneux (1992) have presented convincing evidence for the existence of a major unconformity between the Eycott Volcanic Group and the underlying Skiddaw Group. We agree with their conclusion that the new interpretation re-opens the debate about a pre-volcanic phase of deformation in the Ordovician of the English Lake District. The continuing British Geological Survey mapping programme has provided further evidence that there was such a phase. Its nature and products are crucial to the understanding of the deformation history of the Lake District Lower Palaeozoic inlier, particularly with respect to the structural complexity of the Skiddaw Group.