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An Upper Llandovery limestone overlying Hollybush Sandstone (Cambrian) in Hollybush Quarry, Malvern Hills

Published online by Cambridge University Press:  01 May 2009

R. K. Jones ,
M. Brooks ,
M. G. Bassett ,
R. L. Austin  and
R. J. Aldridge
R. K. Jones
Affiliation:
Department of Geology, University College, Singleton Park, Swansea.
M. Brooks
Affiliation:
Department of Geology, University College, Singleton Park, Swansea.
M. G. Bassett
Affiliation:
Department of Geology, National Museum of Wales, Cardiff.
R. L. Austin
Affiliation:
Department of Geology, The University, Southampton.
R. J. Aldridge
Affiliation:
Department of Geology, The University, Southampton.
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Summary

New exposures of Upper Llandovery and Cambrian strata are described from the southern Malvern Hills. The rocks occur in a small faulted outlier between Midsummer and Hollybush Hills, within the main Pre-Cambrian outcrop. The Cambrian is represented by a thin succession of Malvern Quartzite and Hollybush Sandstone and is overlain by an Upper Llandovery limestone with a basal conglomerate containing rounded pebbles of Hollybush Sandstone. The new exposures weaken the case for a major post-Llandoverian fault at the western boundary of the local Pre-Cambrian outcrop, but provide further evidence of an important phase of pre-Llandoverian tectonism in the Malvern area.

Faunas of brachiopods, graptolites and conodonts from the Llandoverian limestone allow a correlation with the C5 substage of the shelly sequence, the griestoniensis graptolite zone and a position near the boundary of the celloni and amorphognathoides conodont zones.

Type
Articles
Information
Geological Magazine , Volume 106 , Issue 5 , October 1969 , pp. 457 - 469
Copyright
Copyright © Cambridge University Press 1969

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