Hostname: page-component-78c5997874-t5tsf Total loading time: 0 Render date: 2024-11-15T01:36:08.919Z Has data issue: false hasContentIssue false
  • English
  • Français

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.
Get access Rights & Permissions [Opens in a new window]

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

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

REFERENCES

Branson, E. B., & Branson, C. C. 1947. Lower Silurian conodonts from Kentucky. J. Paleont, 21,549–556.Google Scholar
Brooks, M. 1969. Reconnaissance seismic refraction surveys in the Malvern Hills area. Geol. J., 6, (2), 147–160.CrossRefGoogle Scholar
Brooks, M., & Druce, E. C. 1965. A Llandovery conglomeratic limestone in Gullet Quarry, Malvern Hills, and its conodont fauna. Geol. Mag., 102, 370–382.CrossRefGoogle Scholar
Butcher, N. E. 1962. The tectonic structure of the Malvern Hills. Proc. Geol Ass., 73, 103–124.CrossRefGoogle Scholar
Cocks, L. R. M. 1968. Some strophomenacean brachiopods from the British Lower Silurian. Bull. Br. Mus. nat. Hist. Geology, 15, 283–324, pls. 1–14.Google Scholar
Cocks, L. R. M., & Walton, G. 1968. A large temporary exposure in the Lower Silurian of Shropshire. Geol. Mag., 105,390–397.CrossRefGoogle Scholar
Cocks, L. R. M., & Rickards, R. B. 1969. Five boreholes from Shropshire and the relationships of shelly and graptolitic facies in the Lower Silurian. Q. Jl geol. Soc. Lond., 124, (for 1968), 213–238.CrossRefGoogle Scholar
Groom, T. T. 1899. The geological structure of the southern Malverns, and of the adjacent district to the west. Q. Jl geol. Soc. Lond., 55,129–169.CrossRefGoogle Scholar
Groom, T. T. 1902. The sequence of the Cambrian and Associated Beds of the Malvern Hills. Q. Jl geol. Soc. Lond., 58, 89–135.CrossRefGoogle Scholar
Phillips, J. 1848. The Malvern Hills, compared with the Palaeozoic districts of Abberley, Woolhope, May Hill, Tortworth and Usk. Mem. geol Surv., U.K. 2(1).Google Scholar
Phipps, C. B., & Reeve, F. A. E. 1964. The Pre-Cambrian-Palaeozoic boundary of the Malverns. Geol. Mag., 101,397–408.CrossRefGoogle Scholar
Reading, H. G., & Poole, A. B. 1961. A Llandovery shoreline from the southern Malverns. Geol. Mag., 98, 295–300.CrossRefGoogle Scholar
Rexroad, C. B. 1967. Stratigraphy and Conodont Paleontology of the Brassfield (Silurian) in the Cincinnati Arch Area. Bull. geol, Surv. Indiana, 36, 1–64.Google Scholar
Symonds, W. S. 1872. Records of the rocks; or, notes on the geology, natural history and antiquities of North and South Wales, Devon & Cornwall, London: Murray. 434 p.Google Scholar
Symonds, W. S. 1880. Old stones. New Edition. A series of geological notes on the Plutonic, Volcanic, Laurentian, Cambrian, Silurian and Devonian rocks in the neighbourhood of Malvern. London: Simpkin, Marshall. 126 p.Google Scholar
Walliser, O. H. 1964. Conodonten des Silurs. Abh. hess. Landesamt. Bodenforsch, 41, 1–106.Google Scholar
Ziegler, A. M. 1966. The Silurian brachiopod Eocoelia hemisphaerica (J. de C. Sowerby) and related species. Palaeontology, 9, 523–43, pls. 83, 84.Google Scholar
Ziegler, A. M., Cocks, L. R. M., & Bambach, R. K. 1968. The composition and structure of Lower Silurian marine communities. Lethaia, 1,1–27.CrossRefGoogle Scholar
Ziegler, A. M., Cocks, L. R. M., & Mckerrow, W. S. 1968. The Llandovery transgression of the Welsh Borderland. Palaeontology, 11,736–782.Google Scholar