Výsledky vyhledávání - "C. J. N. Fletcher"

Development of glacial Llyn Teifi, west Wales: evidence for lake-level fluctuations at the margins of the Irish Sea ice sheet

Autor: H. J. Siddle, C. J. N. Fletcher

Publikováno v: Journal of the Geological Society. 155:389-399

A thick sequence of Quaternary laminated silt and clay, sand, gravel, and diamict has recently been proven at Llandudoch (St Dogmaels), west Wales. Most of these deposits accumulated in a tributary valley of Afon (River) Teifi, that formed prior to t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::371868b49b8cf06f9596fdedeb5776be
https://doi.org/10.1144/gsjgs.155.2.0389

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Regional tectonic setting of Hong Kong: implications of new gravity models

Autor: K. W. Lai, R. M. Carruthers, Jonathan P. Busby, S. D. G. Campbell, C. J. N. Fletcher

Publikováno v: Journal of the Geological Society. 154:1021-1030

Hong Kong lies on the SE margin of the Cathaysia Block and straddles the NE-trending Lianhuashan Fault Zone, one of the dominant structural features of SE China. Isotope signatures of the Mesozoic granites have indicated that the zone overlies a majo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::749ccc6e453f8da9ebdc184b4b54c4aa
https://doi.org/10.1144/gsjgs.154.6.1021

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The significance of primary volcanic fabrics and clay distribution in landslides in Hong Kong

Autor: S. D. G. Campbell, P. A. Kirk, Richard J. Merriman, C. J. N. Fletcher

Publikováno v: Journal of the Geological Society. 154:1009-1019

Most rain-induced landslides on Hong Kong’s volcanic rocks are shallow and small-scale. However, two major landslides that occurred on Hong Kong Island in 1995 highlight relationships between primary volcanic foliations and kaolin accumulations tha

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::917641934506f48dc208058c32e0458a
https://doi.org/10.1144/gsjgs.154.6.1009

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Synchronous very low-grade metamorphism, contraction and inversion in the central part of the Welsh Lower Palaeozoic Basin

Autor: Steven Hirons, B. Roberts, D. Wilson, C. J. N. Fletcher, Richard J. Merriman

Publikováno v: Journal of the Geological Society. 153:277-285

A metamorphic map (white mica crystallinity) based on 663 data points has been generated for the recently published British Geological Survey 1:50 000 geological sheets 178 (Llanilar) and 179 (Rhayader). Epizone, upper anchizone, lower anchizone and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::63542e8c1cbef3cad739a546364754d3
https://doi.org/10.1144/gsjgs.153.2.0277

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Geochemical characteristics of Danfeng meta-volcanic rocks in Shangzhou area, Shaanxi Province

Autor: Zhou Dingwu, C. J. N. Fletcher, Han Song, Zhang Chengli, W. R. Fitches

Publikováno v: Chinese Journal of Geochemistry. 14:203-211

The Danfeng meta-volcanics in the Shangzhou area, Shaanxi Province are characterized by oceanic island arc volcanic geochemistry. They are a suite of low-K tholeiitic series and calc-alkaline series meta-volcanic rocks derived from different sources

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::61eeaeef7ed50d658f8a54ce425fc8ad
https://doi.org/10.1007/bf02842043

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Metallogenic evolution in Wales: constraints from lead isotope modelling

Autor: T. B. Colman, C. J. N. Fletcher, I. G. Swainbank

Publikováno v: Journal of the Geological Society. 150:77-82

Galena has been collected from different styles of mineralization throughout Wales. Galenas from the Ordovician volcanogenic mineralization at Parys Mountain, north Wales, give highly variable lead isotope ratios, which could have been produced eithe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dda14907daf2320735d98286a69ad36b
https://doi.org/10.1144/gsjgs.150.1.0076

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Some constraints on the form of the Welsh Basin from regional gravity and aeromagnetic data, with particular reference to Central Wales

Autor: C. J. N. Fletcher, A. J. W. McDonald, R. M. Carruthers, R. B. Evans

Publikováno v: Geological Magazine. 129:515-522

Gravity and aeromagnetic data sets provide systematic coverage over the whole of the Welsh Basin. Physical property information shows considerable overlap in densities within the Lower Palaeozoic and Precambrian formations, with relatively few units

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e4ff3388eed0749698567beba6cacea2
https://doi.org/10.1017/s0016756800021671

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Discussion of ‘A late Ordovician/early Silurian non-depositional slope and perched basin along the Tywi Anticline, Mid Wales’ by D. M. D. James

Autor: Jeremy Davies, C. J. N. Fletcher, R. A. Waters, D. Wilson

Publikováno v: Geological Journal. 27:285-289

In Volume 26, 7-26 of the Journal, Dr D. M. D. James described the stratigraphy, sedimentology and structure of the late Ordovician to earliest Silurian succession in the core of the Tywi Anticline between the Sugar Loaf and the Wye Valley. He has us

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::143f54bca73eb3242a77dc3e8618a66b
https://doi.org/10.1002/gj.3350270306

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