Nefyn and part of Caernarfon : bedrock and superficial deposits /
Arbon, K. A.,cartographer.
Simpson, C.,cartographer.
Bradley, M. A.,cartographer.
British Geological Survey,publisher.
Relief shown by contours.
Includes generalized vertical sections at scale 1:12,500 and three additional maps.
Includes sections and index maps to adjoining sheets.