Fydlyn Group

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Journal Article
Published: 01 August 1979
Journal of the Geological Society (1979) 136 (4): 407–432.
.... It is proposed that Greenly's Fydlyn Group does not form part of the Mona Complex but may be correlated with the Caradocian volcanics of Parys Mountain. No major structural discordance occurs between the Gwna Group and the overlying Ordovician rocks on the N coast. The time gap represented by this contact has...
Journal Article
Published: 01 February 1991
Journal of the Geological Society (1991) 148 (1): 5–8.
... described; the Skerries Group, Gwna Group and Fydlyn Group (Shackleton 1969). The most characteristic feature of the Gwna Group exposures is that the rocks are melanges and no coherent internal stratigraphy for this sequence is known. The stratigraphic status of the Skerries Group and, in particular...
Journal Article
Published: 01 August 1979
Journal of the Geological Society (1979) 136 (4): 424–432.
... turbidites, distal turbidites and tufface- ous members such as the Skerries Group, Church Bay Tuffs, Fydlyn Group, Gwyddel Beds and Aber Geirch Phyllites. I broadly agree with that aspect of Barber & Max s interpretaion of N Anglesey which recognizes mklanges separated by a Greywacke Group and with the lower...
Journal Article
Published: 01 February 1979
Journal of the Geological Society (1979) 136 (1): 61–64.
..., p. 77). Fydlyn Felsitic Formation GWNA GROUP (3000m) ~ ~~ Tyfry Formation Gwna M6lange Formation * Ceinwen & Llanddwyn Spilitic Formation * man Spilitic Formation Triple 'Group' Formation SKERRIES GROUF (500m) Church Bay Tuff Formation Skerries Formation m HARBOUR GROUP (2000m) Rhoscolyn Formation...
Series: Geological Society, London, Special Reports
Published: 01 January 1994
DOI: 10.1144/SR22.9
EISBN: 9781786202857
... ( Thorpe et al. 1984 ; Phillips 1989 ). Above this, several other sedimentary and volcanic lithostratigraphical units have been recognized (Skerries, Gwna, and Fydlyn groups of Greenly 1919 ; see also Shackleton 1975 ). The most widespread and distinctive of these is the Gwna Group which, as the first...
Series: Geological Society, London, Geology of Series
Published: 01 January 2006
DOI: 10.1144/GOEWP.2
EISBN: 9781862393882
... from the Proterozoic rocks of the rest of southern Britain led to the application of the suspect terrane concept (Gibbons 1987, 1990; Pharaoh & Carney 2000). This led to the recognition of three terranes on Anglesey that are grouped into the Monian Composite Terrane and, together with improved...
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