Hostname: page-component-cd9895bd7-dk4vv Total loading time: 0 Render date: 2024-12-24T16:17:54.785Z Has data issue: false hasContentIssue false
  • English
  • Français

Age of the Eycott Volcanic Group and its conformable relationship to the Skiddaw Slates in the English Lake District

Published online by Cambridge University Press:  01 May 2009

C. Downie  and
N. J. Soper
C. Downie
Affiliation:
Department of Geology, University of Sheffield, Mappin Street, St George's Square, Sheffield, S1 3JD
N. J. Soper
Affiliation:
Department of Geology, University of Sheffield, Mappin Street, St George's Square, Sheffield, S1 3JD
Get access Rights & Permissions [Opens in a new window]

Summary

An earliest Llanvirn age is established on micropalaeontological grounds for the interbedded lava–pelite sequence at the base of the Binsey Volcanic Formation in the northern Lake District. The northern volcanic sequence, here termed the Eycott Volcanic Group, is earlier than, and chemically distinct from, the main Borrowdale Volcanic Group. The evidence precludes a regional unconformity between the Skiddaw Slates and the overlying volcanic rocks, but is compatible with the hypothesis that the vulcanicity occurred in an island arc environment.

Type
Articles
Information
Geological Magazine , Volume 109 , Issue 3 , May 1972 , pp. 259 - 268
Copyright
Copyright © Cambridge University Press 1972

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Dewey, J. F. 1969. Evolution of the Appalachian/Caledonian orogen. Nature, Lond. 222, 124–9.CrossRefGoogle Scholar
Eastwood, T., Hollingworth, S. E., Rose, W. C. C. & Trotter, F. M. 1968. Geology of the country around Cockermouth and Caldbeck. Mem. geol. Surv. U.K. x + 298 pp. H.M.S.O., London.Google Scholar
Fitton, J. G. & Hughes, D. J. 1970. Volcanism and plate tectonics in the British Ordovician. Earth Planetary Sci. Letters 8, 223–8.CrossRefGoogle Scholar
Helm, D. G. 1970. Stratigraphy and structure of the Black Combe inlier, English Lake District. Proc. Yorks. geol. Soc. 38, 105–48.CrossRefGoogle Scholar
Helm, D. G. & Roberts, B. 1971. The relationship between the Skiddaw and Borrowdale Volcanic Groups in the English Lake District. Nature, Lond. 232, 181–3.Google Scholar
Jackson, D. E. 1962. Graptolite zones in the Skiddaw Group in Cumberland, England. J. Palaeont. 36, 300–13.Google Scholar
Jeans, P. J. F. 1972. The junction between the Skiddaw Slates and Borrowdale Volcanics in Newlands Beck, Cumberland. Geol. Mag. 109, 25–28.CrossRefGoogle Scholar
Lister, T. R., Burgess, I. C. & Wadge, A. J. 1969. Microfossils from the cleaved Skiddaw Slates of Murton Pike and Brownber (Cross Fell inlier). Geol. Mag. 106, 97–9.CrossRefGoogle Scholar
Lister, T. R. & Holliday, D. W. 1970. Phytoplankton (acritarchs) from a small Ordovician inlier in Teesdale (Country Durham), England. Proc. Yorks. geol. Soc. 37, 449–60.CrossRefGoogle Scholar
Mitchell, A. H. & Reading, H. G. 1971. Evolution of island arcs. J. Geol. 79, 253–84.CrossRefGoogle Scholar
Moseley, F. Tectonic history of N.W. England. J. geol. Soc. (In press.)Google Scholar
Nutt, M. J. C. 1968. Borrowdale Volcanic Series and associated rocks around Hawes-water, Westmorland. Proc. geol. Soc. Lond. No. 1649, 112–13.Google Scholar
Roberts, D. E. 1971. Structures of the Skiddaw Slates in the Caldew valley, Cumberland. Geol. J. 7, 225–38.CrossRefGoogle Scholar
Rose, W. C. C. 1954. The sequence and structure of the Skiddaw Slates in the Keswick–Buttermere area. Proc. Geol. Ass. 65, 403–6.CrossRefGoogle Scholar
Simpson, A. 1967. The stratigraphy and tectonics of the Skiddaw Slates in relation to the overlying Borrowdale Volcanic Series in part of the Lake District. Geol. J. 5, 391–418.CrossRefGoogle Scholar
Simpson, A. 1968. The Caledonian history of the north-eastern Irish Sea region and its relation to surrounding areas. Scott. J. Geol. 4, 135–63.CrossRefGoogle Scholar
Soper, N. J. 1970. Three critical localities on the junction of the Borrowdale Volcanic rocks with the Skiddaw Slates in the Lake District. Proc. Yorks. geol. Soc. 37, 461–93.CrossRefGoogle Scholar
Soper, N. J. & Roberts, D. E. 1971. Age of cleavage in the Skiddaw Slates in relation to the Skiddaw aureole. Geol. Mag. 108, 293–302.CrossRefGoogle Scholar
Wadge, A. J. 1971. Skiddaw Slates and the Borrowdale Volcanics (letter). Nature, Lond. 234, 58–9.Google Scholar
Wadge, A. J. 1971. Sections through the Skiddaw–Borrowdale unconformity in eastern Lakeland. Proc. Yorks. geol. Soc. (In press.)Google Scholar
Wadge, A. J., Owens, B. & Downie, C. 1967. Microfossils from the Skiddaw Group. Geol. Mag. 104, 506–7.CrossRefGoogle Scholar
Webb, B. 1972. North–South trending pre-cleavage folds in the Skiddaw Slate Group of the English Lake District. Nature, Lond. 235, 138–140.Google Scholar