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  • Eycott Volcanic Group, Caradoc magmatism, Ordovician, Northern England
    ...he Eycott volcanic rocks closely resemble the Birker Fell Formation of the Borrowdale Volcanic Group and probably developed in a similar manner. Thickening of parts of the succ ...c cyclicity within an Ordovician continental-arc volcanic field: the lower Borrowdale Volcanic Group, English Lake District. ''Journal of Volcanology and Geothermal Research'', ...
    6 KB (825 words) - 16:42, 5 May 2016
  • Borrowdale Volcanic Group, contemporaneous intrusive rocks and petrography of the volcanic rocks, Caradoc magmatism, Ordovician, Northern England
    ...c cyclicity within an Ordovician continental-arc volcanic field: the lower Borrowdale Volcanic Group, English Lake District. ''Journal of Volcanology and Geothermal Research'', ...e English Lake District: distinction from block lavas and implications for Borrowdale Volcanic Group stratigraphy. ''Geological Journal'', Vol. 23, 171–187. ...
    6 KB (826 words) - 13:34, 5 May 2016
  • Caradoc magmatism, Ordovician, Northern England
    ...lie at the heart of one of the major silicic caldera volcanoes within the Borrowdale Volcanic Group. (P005109).]] ...ic rocks [[Media:P916043.jpg|(P916043)]]. In the southern half-graben, the Borrowdale Volcanic Group comprises at least 6000 m of basaltic to rhyolitic lavas and sills, al ...
    7 KB (1,008 words) - 15:52, 5 May 2016
  • Borrowdale Volcanic Group, introduction, Caradoc magmatism, Ordovician, Northern England
    ...thumbnail|Generalised south–north and west–east cross-sections through the Borrowdale Volcanic Group showing the relationships of the various stratigraphical units. Sills are o ...|thumbnail|Distribution of the lithostratigraphical successions within the Borrowdale Volcanic Group. See Table 2 for details of the successions. The lines of cross-sections re ...
    8 KB (1,110 words) - 15:34, 5 May 2016
  • Basin uplift and volcanism, Skiddaw and Manx groups, early Ordovician, Northern England
    ...mably overlie the Skiddaw Group. South of the Causey Pike Fault, below the Borrowdale Volcanic Group, various Arenig to Llanvirn biostratigraphical levels occur close to the un ...p basin. A network of volcanotectonic, caldera-related faults disrupts the Borrowdale Volcanic Group with proved displacement commonly in excess of 400<br>m. It is highly proba ...
    8 KB (1,211 words) - 13:29, 5 May 2016
  • Timing and structural setting of Caradoc magmatism, Ordovician, Northern England
    ...tt volcanism. The widths of the contiguous Eycott Volcanic Group (EVG) and Borrowdale Volcanic Group (BVG) half-grabens have been obtained from the reduction of Acadian strain [[File:P916045.jpg|thumbnail|Map of the Borrowdale Volcanic Group showing the main depositional centres and principal faults with displacemen ...
    12 KB (1,745 words) - 13:33, 6 May 2016
  • British regional geology: Northern England
    ...canic Group, introduction, Caradoc magmatism, Ordovician, Northern England|Borrowdale Volcanic Group]] ::: [[Borrowdale Volcanic Group, lower andesitic eruptive phase, Caradoc magmatism, Ordovician, Northern En ...
    14 KB (1,789 words) - 13:20, 5 May 2016
  • Borrowdale Volcanic Group, lower andesitic eruptive phase, Caradoc magmatism, Ordovician, Northern England
    ...|thumbnail|Distribution of the lithostratigraphical successions within the Borrowdale Volcanic Group. See Table 2 for details of the successions. The lines of cross-sections re ...e relationship between lithofacies within the Birker Fell Formation of the Borrowdale Volcanic Group. The diagram approximates to a north-west to south-east cross-section from ...
    12 KB (1,815 words) - 15:36, 5 May 2016
  • Duddon Conglomerate Member
    ...ly with ferruginous skins. Clast lithologies all occur locally and include Borrowdale Volcanic Group andesite, tuff and rhyolite, Silurian ‘grit’ and ‘greywacke’ and Eskdale Gr ...
    2 KB (272 words) - 15:53, 26 July 2021
  • OR/14/048 Starting materials
    ...ological disposal facility for radioactive wastes. V. Reaction of powdered Borrowdale Volcanic Group lithologies with synthetic evolved near-field groundwater. ''Nirex Report'' ...1995b">BOND, K A, and TWEED, C J. (1995). Groundwater compositions for the Borrowdale Volcanic Group, Boreholes 2, 4 and RCF3, Sellafield, evaluated using thermodynamic modelli ...
    10 KB (1,629 words) - 17:59, 4 February 2016
  • Northern England district - Lake District and surrounding areas
    ...ash deposits and lavas erupted from volcanoes about 450 million years ago (Borrowdale Volcanic Group). This part of the Lake District is associated with extensive base metal mi ...
    5 KB (742 words) - 16:41, 18 April 2016
  • Lake District Batholith, Caradoc magmatism, Ordovician, Northern England
    ...anoes worldwide. Evidence for substantial uplift during emplacement of the Borrowdale Volcanic Group is generally lacking and it must be concluded that injection of the granite ...elief of several hundreds of metres is present on the upper surface of the Borrowdale Volcanic Group, but very low relief is present south-west of Ambleside, where the unconfor ...
    17 KB (2,499 words) - 17:19, 5 May 2016
  • Early Ordovician: Skiddaw and Manx groups, introduction and stratigraphical framework, Northern England
    ...cts during late Ordovician magmatism (i.e. associated with eruption of the Borrowdale Volcanic Group) and tectonic effects during Early Devonian (Acadian) deformation. Acadian ...
    14 KB (2,072 words) - 16:32, 5 May 2016
  • Building stone, geology and man, Northern England
    ...re derived from the volcaniclastic rocks of the Seathwaite Fell Formation (Borrowdale Volcanic Group) (MNS 5415) (P244111).]] ...lithologies occur at several stratigraphical levels within the Ordovician, Borrowdale Volcanic Group, but most of the commercial working has taken place within the Eagle Crag M ...
    9 KB (1,391 words) - 15:42, 5 May 2016
  • Windemere Supergroup, introduction and stratigraphical framework, late Ordovician to Silurian, Northern England
    ...basal beds of the Windermere Supergroup, resting unconformably on both the Borrowdale Volcanic Group and (in Furness) the Skiddaw Group, are early Ashgill in age; they comprise ...
    14 KB (2,103 words) - 13:32, 6 May 2016
  • Borrowdale Volcanic Group, upper silicic eruptive phase, Caradoc magmatism, Ordovician, Northern England
    [[File:P916045.jpg|thumbnail|Map of the Borrowdale Volcanic Group showing the main depositional centres and principal faults with displacemen ...stic rocks, which include some of the most garnetiferous rocks seen in the Borrowdale Volcanic Group, are overlain by a flow-foliated felsitic unit, recognised only locally aro ...
    28 KB (4,117 words) - 15:41, 5 May 2016
  • Early Devonian magmatism, Acadian Orogeny, Devonian, Northern England
    ...rnet–epidote–hornblende veins. The aureole overprints cleavage in both the Borrowdale Volcanic Group and Windermere Supergroup, but some of the dykes believed to be cogenetic w ...anic complexes of the Lake District, with the Birker Fell Formation of the Borrowdale Volcanic Group and the main part of the Eycott Volcanic Group; all three may have resulted ...
    19 KB (2,850 words) - 16:20, 5 May 2016
  • Acadian Orogeny, Devonian, Northern England
    ...the southern, Westmorland Monocline; it affects the southern margin of the Borrowdale Volcanic Group outcrop and the overlying Windermere Supergroup strata, and lies above the == Borrowdale Volcanic Group structure == ...
    29 KB (4,392 words) - 13:30, 5 May 2016
  • Skiddaw Group succession, early Ordovician, Northern England
    ...Tarn Moor Formation is cut out by the unconformable base of the overlying Borrowdale Volcanic Group and the youngest Skiddaw Group strata remaining (from the ''murchisoni'' Bi ...
    17 KB (2,557 words) - 13:33, 6 May 2016
  • Old Red Sandstone, Devonian, Northern England
    ...polygenetic, red-bed conglomerate contains clasts derived mostly from the Borrowdale Volcanic Group and the Windermere Supergroup. Some clasts preserve a cleavage, confirming ...
    9 KB (1,308 words) - 13:33, 6 May 2016
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