| Stephenson, D., Bevins, R. E., Millward, D., Highton, A. J., Parsons, I., Stone, P., Wadsworth, W. J. (1999) Chapter 2: Early Ordovician volcanic rocks and associated opholitic assemblages of Scotland. In Caledonian Igneous Rocks of Great Britain (Geological Conservation Review Series - Geological Conservation Review No. 17. Joint Nature Conservation Committee, Peterborough. p.27-104. |