An Outline of the Geology of South-Western Lleyn

Abstract

A geological survey of the Pre-Cambrian area of South-Western Lleyn and of some of the Ordovician country to the east of it was made by the present writer between the years 1909 and 1912. An account of the geology of Bardsey Island was published in 1913, but ten years' absence abroad has delayed the description of the rocks of the adjacent mainland. A further absence from Europe will cause additional delay in the presentment of a full account of the district, and it seems desirable that some of the more important results of the survey of this tract of ground should now be placed on record.