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Memoir for 1:50 000 Geological Sheet 134 (England and Wales)
出版H.M. Stationery Office, 2002
ISBN01188456169780118845618
URLhttp://books.google.com.hk/books?id=0NVOAQAAIAAJ&hl=&source=gbs_api
註釋The district described in this memoir (1:50 000 geological sheet 134) covers the central area of the Llyn Peninsula in north-west Wales. The solid rock types vary from deformed m'lange and Precambrian granites, through an array of Cambrian and Ordovician clastic sedimentary rocks, to a wide range of tholeitic to alkaline and ultrabasic to acid igneous rocks.