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Dolwyddelan

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Journal Article
Published: 01 November 1969
Geological Magazine (1969) 106 (6): 603–606.
Journal Article
Published: 01 April 1977
Journal of the Geological Society (1977) 133 (4): 401–411.
... sources east of Betwsy Coed. In the region of Dolwyddelan a rising submarine ridge is invoked to provide separation between the shallow-water, bedded basaltic tuff sequence of the former and the acid © Geological Society of London 1977 1977 Geological Society of London Conference report Palaeozoic...
Book Chapter

Series: Geological Society, London, Special Reports
Published: 01 January 2000
DOI: 10.1144/SR24.5
EISBN: 9781862396920
... Mudstones, Cadnant Shale, Llanrychwyn Slates, Black Slates of Dolwyddelan, Tynyglyn Mudstone, Blaenycwm Beds, Peny-Garnedd Shales. The general absence of Cautleyan strata suggests that the Ashgill Series rests with non-sequence on the Nod Glas, and at Bala it is unconformable on older rocks. This widespread...
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Journal Article
Published: 01 May 1986
Journal of the Geological Society (1986) 143 (3): 411–423.
... to localities men- tioned in the text. involved. Deposition in tidal and shallow subtidal environments, with periodic storm events, is envisaged. There is evidence, however, both in the NW, at Cwm Idwal and Bwlch y ddeufaen, and in the SE, on the south side of the Dolwyddelan Syncline (Fig. l...
Journal Article
Published: 01 April 1980
Journal of the Geological Society (1980) 137 (2): 154–156.
.... B. 1931. The geology of the Dolwyddelan .syncline (North Wales). Q. J. geol. Soc. London, 87, 425-58. Read 2 June 1979; received 28 June 1979; revised typescript received 24 August JEREMY K. LEGGE~T, Department of Geology, Royal School of Mines, Imperial 1979. College, London SW7 2BP. Discussion DR...
Series: Geological Society, London, Geology of Series, Geological Society, London, Geology of Series
Published: 01 January 2006
DOI: 10.1144/GOEWP.3
EISBN: 9781862393882
FIGURES | View All (47)
Journal Article
Published: 01 April 1999
Journal of the Geological Society (1999) 156 (2): 301–316.
... of Ordovician age, North Wales Geological Magazine 1987 12A 427 439 Romano M. Diggens J.N. Longvillian shelly faunas from the Dolwyddelan area, North Wales Geological Magazine 1969 106 603 606 Roberts B. Succession and structure in the Llwyd Mawr syndine, Caernarvonshire...
Journal Article
Published: 01 March 1986
Journal of the Geological Society (1986) 143 (2): 259–273.
... 1971 B80 211 23 Williams H. The geology of Snowdon (North Wales) Quarterly Journal of the Geological Society of London 1927 83 346 431 Williams H. Bulman O. M. B. The geology of the Dolwyddelan syncline (North Wales) Quarterly Journal of the Geological Society...
Journal Article
Published: 01 September 1973
Journal of the Geological Society (1973) 129 (5): 481–503.
.... Bulman O. M. B. The geology of the Dolwyddelan syncline (North Wales) Q J geol Soc Lond 1931 87 425 458 The Cambrian and Ordovician rocks of the Migneint area, North Wales BRYAN D. T. LYNAS CONTENTS I Stratigraphy (A) The Ffestiniog Formation (Cambrian) (s) The Dolgelley Formation...
Journal Article
Published: 01 September 1985
Journal of the Geological Society (1985) 142 (5): 875–888.
... A . J . Reedman et al. FIG. 1. Distribution of the Llewelyn and Snowdon Volcanic Groups and the position of the Lower Rhyolitic Tuff Formation caldera. Volcanogenic mineralization of Snowdon 877 NE SM NE OF CAPEL CURlG DOLWYDDELAN SNOWDON FIG. 2. Generalized stratigraphic relationships in the Llewelyn...
Journal Article
Published: 01 August 1990
Journal of the Geological Society (1990) 147 (4): 615–618.
... occurs in the Dolwyddelan syncline of North Wales. Black graptolitic slates in the core of the syncline have failed to yield acritarchs, in contrast to their common occurrence lower in the sequence, in the marine mudstones, siltstones and sandstones of the Llewelyn Volcanic Group and Nant Ffrancon...
Book Chapter

Author(s)
D. Q. Bowen
Series: Geological Society, London, Special Reports, Geological Society, London, Special Reports
Published: 01 January 1999
DOI: 10.1144/SR23.7
EISBN: 9781786202864
FIGURES
Journal Article
Published: 01 April 1980
Journal of the Geological Society (1980) 137 (2): 139–156.
.... Bassett D. A. Dean W. T. Ingham J. K. Wright A. D. Whittington H. B. A correlation of Ordovician rocks in the British Isles Spec.Rep. geol. Soc. London 1972 3 1 74 Williams H. Bulman O. M. B. The geology of the Dolwyddelan syncline (North Wales) Q. J. geol. Soc...
Journal Article
Published: 01 August 1985
Journal of the Geological Society (1985) 142 (4): 615–624.
.... The inferred trace of the clinozoisite isograd trending N-S immediately west of Criccieth (Roberts 1981) would be better placed 2-3 km eastward. 4. Future examination of metabasites cropping out east of Dolwyddelan should demonstrate an extension eastward of the pumpellyite zone inlier, mapped north of Blaenau...
Journal Article
Journal: Clay Minerals
Published: 01 March 2006
Clay Minerals (2006) 41 (1): 473–512.
... and Dolwyddelan Slates in north Wales, and are unusual in containing little or no chlorite in clay mineral assemblages that consist largely of 2 M 1 K-mica ± paragonite or intermediate Na/K-mica. In relation to metapelitic grade, mudrocks of Ashgill age show similar clay mineral assemblages to those found...
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Journal Article
Journal: AAPG Bulletin
Published: 01 January 1952
AAPG Bulletin (1952) 36 (1): 1–72.
FIGURES | View All (49)