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Silurian volcanism in the central Welsh Borderland

Published online by Cambridge University Press:  01 May 2009

R. W. Sanderson  and
R. Cave
R. W. Sanderson
Affiliation:
Institute of Geological Sciences, Exhibition Road, London SW7 2DE
R. Cave
Affiliation:
Institute of Geological Sciences, Exhibition Road, London SW7 2DE
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Summary

This study of Silurian volcanism considers three small intrusions near Bishop's Castle, Salop, as possible volcanic feeders. Acid magma intrusive into Silurian calcareous siltstones has resulted in microgranite dykes, hornsfelsed country rock and metasomatized breccia. The intrusions are of late Wenlock age or younger, but they are relatable to other Wenlock igneous rocks in the area, and are in contrast to nearby Carboniferous basaltic rocks.

Type
Articles
Information
Geological Magazine , Volume 117 , Issue 5 , September 1980 , pp. 455 - 462
Copyright
Copyright © Cambridge University Press 1980

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References

Allender, R., Holland, C. H., Lawson, J. D., Walmesley, V. G., Whitaker, J. H. McD. 1960. Summer field-meeting at Ludlow. Proc. Geol. Ass. Lond. 71, 209–32.Google Scholar
Blyth, F. G. H. 1944. Intrusive rocks of the Shelve area, south Shropshire. Q. Jl geol. Soc. Lond. 99 (for 1943), 169–204.CrossRefGoogle Scholar
Butler, A. J. 1937. On Silurian and Cambrian Rocks encountered in a deep boring at Walsall, South Staffordshire. Geol. Mag. 74, 241–57.Google Scholar
Butler, A. J. 1939. The stratigraphy of the Wenlock Limestone of Dudley. Q. Jl geol. Soc. Lond. 95, 37–74.CrossRefGoogle Scholar
Cave, R. 1965. The Nod Glas sediments of Caradoc age in North Wales. Geol. J. 4, 279–98.Google Scholar
Cave, R. & Nutt, M. J. C. (In the press) (Cum, ed.). Slumped Wenlock strata and an associated ash-flow tuff near Welshpool, North Wales. Geol. J.Google Scholar
Cave, R. & White, D. 1971. The exposures of Ludlow Rocks and associated beds at Tites Point and near Newnham, Gloucestershire. Geol. J. 7, 239–54.Google Scholar
Cocks, L. R. M. & Rickards, R. B. 1969. Five boreholes in Shropshire and the relationships of shelly and graptolitic facies in the Lower Silurian. Q. Jl geol. Soc. Lond. 124 (for 1968), 213–38.Google Scholar
Cribb, S. J. 1975. Rubidium-strontium ages and strontium isotope ratios from the igneous rocks of Leicestershire. Q. Jl geol. Soc. Lond. 131, 203–12.CrossRefGoogle Scholar
Davies, J. H. 1978. An outcrop of pre-Silurian rocks near Bishop's Castle (S. of the Shelve) Salop, England. Geol. Mag. 115, 447–51.Google Scholar
Hains, B. A. 1962. In Summ. Prog. Geol. Surv. G. B. for 1961, 35–6.Google Scholar
Howells, M. F. & Tulloch, W. 1967. In Lumsden, G. I. Tulloch, W. Howells, M. F. Davies, A. The geology of the neighbourhood of Langholm. Mem. Geol. Surv. Scot.Google Scholar
Murchison, R. I. 1839. The Silurian system, part II. London.Google Scholar
Ramsay, A. C., Bristow, H. W. & Bauerman, H. 1858. A descriptive catalogue of the rock specimens in the Museum of Practical Geology. Geol. Surv. Gt Brit.Google Scholar
Trewin, N. H. 1971. Potassium bentonites in the Wenlock Limestone of Shropshire. Mercian Geol. 4, 1–7.Google Scholar
Wade, A. 1911. The Llandovery and associated rocks of north-eastern Montgomeryshire. Q. Jl geol. Soc. Lond. 67, 415–69.Google Scholar
Warren, P. T. 1971. The sequence and correlation of graptolite faunas from the Wenlock-Ludlow rocks of North Wales. Mem. Bur. Rech. geol. Minier. 73, 451.Google Scholar
Watts, W. W. 1925. The geology of south Shropshire. Proc. geol. Ass. 36, 321.CrossRefGoogle Scholar
White, D. E. & Lawson, J. D. 1978. The stratigraphy of new sections in the Ludlow Series of the type area, Ludlow, Salop, England. Rep. Inst. Geol. Sci. 78/30.Google Scholar
Ziegler, A. M., McKerrow, W. S., Burne, R. V. & Baker, P. E. 1969. Correlation and environmental setting of the Skomer Volcanic Group, Pembrokeshire. Proc. geol. Ass. 80, 409–39.Google Scholar