Nanhoron Intrusion

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Journal Article
Published: 01 August 1991
Journal of the Geological Society (1991) 148 (4): 703–710.
... regional deformation and cleavage development. Regional cleavage formed during the climax of Lower Devonian, Acadian deformation (Wood- cock et al. 1988). Intrusive rocks in Snowdonia and the Nanhoron and Llanbedrog intrusions in Llyn are clearly pre-tectonic, having cleaved, hornfelsed margins (Sargent...
Journal Article
Published: 01 April 1999
Journal of the Geological Society (1999) 156 (2): 301–316.
... well defined: a Carn Fadryn Suite of intrusive dacites and quartz microdiorites, and a Nanhoron Suite of peralkaline, commonly riebeckite-bearing, microgranites. The Carn Fadryn Suite is interpreted to be the intrusive equivalent of the Foel Ddu Rhyodacite Formation and the Penmaen Formation. Also...