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Llyn Peninsula

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A: Location and geomorphological context of <span class="search-highlight">Llŷn</span> <span class="search-highlight">Peninsula</span> in Irish–Celtic ...
Published: 29 July 2017
Figure 1. A: Location and geomorphological context of Llŷn Peninsula in Irish–Celtic Sea region. Coastline (gray line) and likely calving fronts (dashed black lines) are based on modeled relative sea level (RSL; −40 m) for Llŷn Peninsula derived from integrated glacial isostatic adjustment (GIA
Journal Article
Published: 01 April 1999
Journal of the Geological Society (1999) 156 (2): 301–316.
...W.E.S. GIBBONS; TIMOTHY P. YOUNG Abstract Ordovician arc magmatism in the Welsh Basin culminated in the development of a NE-SW corridor of intense volcanism extending for > 65 km in northwest Wales from Conwy through Snowdonia to Llanbedrog in the central Llŷn Peninsula. New data from central...
Book Chapter

Series: Geological Society, London, Special Reports
Published: 01 January 2000
DOI: 10.1144/SR24.5
EISBN: 9781862396920
...Abstract Abstract In North Wales (fig. 9) the Ordovician, mainly represented by the Gwynedd Supergroup of Woodcock (1990), occupies a broad tract surrounding the Cambrian of the Harlech Dome and extends eastwards to the Bala area and westwards over much of the Llŷn Peninsula (Roberts 1979...
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Series: Geological Society, London, Special Reports
Published: 01 January 1994
DOI: 10.1144/SR22.10
EISBN: 9781786202857
...Abstract Abstract This chapter considers the Precambrian rocks that lie beneath Lower Palaeozoic strata in England and Wales, but excludes the Monian rocks exposed in Anglesey and the Llŷn Peninsula in northwest Wales (see Chapter 9). It includes the Sam Complex on Llŷn because these rocks...
Journal Article
Published: 01 July 1984
Journal of the Geological Society (1984) 141 (4): 701–709.
...R. D. Beckinsale; J. A. Evans; R. S. Thorpe; W. Gibbons; R. S. Harmon Abstract The Mona Complex exposed on the Llŷn peninsula includes the Sarn Complex, which is a suite of variably-deformed, plutonic igneous rocks (originally mapped partly as gneisses) ranging from gabbro to granite, and an inlier...
Journal Article
Published: 22 March 2022
The Canadian Mineralogist (2022) 60 (1): 171–199.
...Derek D.V. Leung; Andrew M. McDonald ABSTRACT The duopoly of curling stone sources suitable for international competition (Ailsa Craig, Firth of Clyde, Scotland and Trefor, Llŷn Peninsula, North Wales) has led to a long-held paradigm that the rocks from these localities are geologically unique...
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Journal Article
Journal: Geology
Published: 29 July 2017
Geology (2017) 45 (9): 787–790.
...Figure 1. A: Location and geomorphological context of Llŷn Peninsula in Irish–Celtic Sea region. Coastline (gray line) and likely calving fronts (dashed black lines) are based on modeled relative sea level (RSL; −40 m) for Llŷn Peninsula derived from integrated glacial isostatic adjustment (GIA...
FIGURES
Journal Article
Published: 01 May 1999
Quarterly Journal of Engineering Geology and Hydrogeology (1999) 32 (2): 119–137.
...P. J. Brabham; R. J. McDonald; D. McCarroll Abstract Porth Neigwl is a 6 km wide, drift-filled embayment, located on the Llyn Peninsula of northwest Wales, UK. The embayment is surrounded by hills formed of Lower Palaeozoic Rocks. Infilling the embayment is a 17 km 2 area of thick Quaternary...
Series: Geological Society, London, Special Reports
Published: 01 January 1994
DOI: 10.1144/SR22.9
EISBN: 9781786202857
... of those in Anglesey are found on the Welsh mainland along the southwestern margin of the Llŷn Peninsula (Fig. 24). In Wales, since the work of Blake (1888), Greenly (1919) and Matley (1928), these rocks have been referred to as Monian. In Ireland, following work by Baker (1955, 1969, 1970), the exposures...
Journal Article
Published: 01 February 1991
Journal of the Geological Society (1991) 148 (1): 5–8.
...W. GIBBONS; M. J. BALL Abstract New borehole data and trench exposures in northern Anglesey show the Gwna Group melange resting directly upon disrupted sedimentary rocks of the New Harbour Group. Field evidence from Anglesey and the Llŷn peninsula shows that units previously given formal...
Image
A: Summer insolation for 60°N ( Berger and Loutre, 1991 ) (dotted line) plo...
Published: 29 July 2017
), and modeled relative sea level (RSL; blue filled circles and dashed line) for Llŷn Peninsula derived from glacial isostatic adjustment (GIA) model of Bradley et al. (2011) . E: Likely calving margin widths (purple; transects shown in Fig. 1A ) and axial trough depths (turquoise) estimated as 10th percentile
Journal Article
Published: 01 December 1989
Journal of the Geological Society (1989) 146 (6): 965–970.
... Cocks L. R. M. Fortey R. A. Fauna1 evidence for ocean separations in the Palaeozoic of Britain Journal of the Geological Society, London 1982 139 465 478 Croudace I. W. The geochemistry and petrogenesis of the Lower Palaeozoic granitoids of the Llyn Peninsula, North Wales...
Journal Article
Published: 01 November 2000
Geological Magazine (2000) 137 (6): 711–712.
.... Smith. They have produced comprehensive site descriptions for the predominantly short-lived, voluminous subalkaline rocks in the Llewelyn and Snowdon Volcanic Groups and also for the Aran and Builth Groups. The contrasting alkaline igneous rocks that constitute the Llanbedrog Volcanic Group on the Llyn...
Journal Article
Published: 01 April 1995
Journal of the Geological Society (1995) 152 (2): 209–212.
... from the Cambro-Ordovician rocks of North Wales, U.K. and their stratigraphic significance Geological Journal 1969 6 333 338 Croudace I.W. The geochemistry and petrogenesis of Lower Palaeozoic granitoids of the Llŷn Peninsula Geochemica and Cosmochemica Acta 1982 46 609 622...
Journal Article
Published: 01 August 1985
Journal of the Geological Society (1985) 142 (4): 615–624.
...B. Roberts; R. J. Merriman Abstract In Snowdonia and Llŷn three prograde stages in metapelites (Gwna Group to Wenlock) are recognized: Stage I, with white mica crystallinity values >0.43Δ°2 θ ; Stage II, 0.43–0.26Δ°2 θ ; Stage III, <0.26 Δ°2 θ . Isocrysts at 0.03Δ°2 θ intervals are drawn...
Journal Article
Published: 16 June 2010
Geological Magazine (2011) 148 (1): 78–88.
... ( 1928 ), and in parts of Llŷn more recently by Gibbons & McCarroll ( 1993 ), the age of mélange deposition remains contentious. Palaeozoic microfossil evidence for its age (e.g. Muir et al . 1979 ) has been contested (Peat, 1984 ) and appears to contradict metamorphic data (e.g. Kawai et al...
Journal Article
Published: 01 August 1991
Journal of the Geological Society (1991) 148 (4): 703–710.
... in North Wales Geological Journal 1985 20 43 52 Croudace I. W. The geochemistry and petrogenesis of the Lower Palaeozoic granitoids of the Lleyn peninsula, North Wales Geochimica et Cosmochimica Acta 1982 46 609 622 Evans J. A. Resetting of the Rb-Sr whole-rock isotope...
Journal Article
Published: 01 February 1996
Journal of the Geological Society (1996) 153 (1): 91–99.
.... Evans J. A. Thorpe R. S. Gibbons W. Harmon R. S. Rh–Sr whole-rock isochron ages, δ 18 O values and geochemical data for the Sarn Igneous Complex and Parwyd gneisses of the Mona Complex of Llŷn, N Wales Journal of the Geological Society London 1984 138 69 74 Clark D.B...
Journal Article
Published: 01 July 1972
Journal of the Geological Society (1972) 128 (4): 388–393.
... Svenska Glaciologiska Expeditionen. Terresta. t : I - 19. SAUND~RS, G. E., I968. A reappraisal of glacial drainage phenomena in the Lleyn Peninsula. Proc. Geol. Ass. 79:3o5-24 Sere, a-r, V., i969. Some comments on glacier surges in eastern Svalbard. Can. J. Earth Sci. 6: 867-73. SHARP, R. P., I949...
Journal Article
Published: 01 July 2005
Journal of Paleontology (2005) 79 (4): 670–686.
... in Zhou et al., 1977 , NIGP137195, adult AP: Crugan Mudstone (middle Ashgill), Afon Penfhos, Llyn Peninsula, North Wales ( Cocks and Rong, 1988 ); Glyptorthis , Dedzetina , Leptestiina , Anisopleurella , Holtedahlina , Leptaena , Foliomena , Christiania , Eostropheodonta...
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