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Geophysical correlation of the Aptian and Albian formations in the Wessex Basin of southern England

Published online by Cambridge University Press:  01 May 2009

A. H. Ruffell
A. H. Ruffell
Affiliation:
Department of Geology, Imperial College, Prince Consort Road, London SW7 2BP, U.K.
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Abstract

Using geophysical borehole log signatures and basic lithological information from sidewall cores and well-cuttings, division and correlation of the mid-Cretaceous sediments of the Wessex Basin can be achieved. A sub-Gault (early Albian) unconformity surface is mapped with some accuracy across the Hampshire–Dorset area, and the deposits of a previous, Aptian transgression are observed. The distinctive log signatures aid in facies reconstructions and sequence stratigraphical analysis: especially the onlap of basal Gault horizons onto and across basement ‘highs’. The highly variable thickness and lithological distributions characteristic of the Wealden pass upward into laterally extensive facies distributions in the Lower Greensand and Gault. Sequence boundaries are identified at the base of the Wealden; Lower Greensand; Gault; within the Gault (cristatum subzone); and base Chalk.

Type
Research Article
Information
Geological Magazine , Volume 128 , Issue 1 , January 1991 , pp. 67 - 75
Copyright
Copyright © Cambridge University Press 1991

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References

Allen, P. 1981. Pursuit of Wealden models. Journal of the Geological Society of London 138, 375–405.CrossRefGoogle Scholar
Anderson, I. D. 1986. The Gault Clay–Folkestone Bedsjunction in West Sussex, Southeast England. Proceedings of the Geologist's Association 97, 45–58.CrossRefGoogle Scholar
Arkell, W. J. 1947. The geology of the country around Weymouth, Swanage, Corfe & Lulworth. Memoirs of the Geological Survey of the United Kingdom. 386 pp.Google Scholar
Bayer, U. & Seilacher, A. 1985. Sedimentary & Evolutionary Cycles. Berlin: Springer-Verlag.CrossRefGoogle Scholar
Bridges, P. J. 1982. Sedimentology of a tidal sea: the Lower Greensand of southern England. In Offshore Tidal Sands (ed. Stride, A. H.), pp. 183–89. London: Chap-man & Hall.Google Scholar
Casey, R. 1961. The stratigraphical palaeontology of the Lower Greensand. Palaeontology 3, 487–622.Google Scholar
Einsele, G. & Seilacher, A. 1982. Cyclic and event stratification. Berlin: Springer-Verlag.CrossRefGoogle Scholar
Hancock, J. M. 1969. Transgression of the Cretaceous sea in South-west England. Proceedings of the Ussher Society 2, 61–83.Google Scholar
Hart, M. B. 1973. A correlation of the macrofaunal and microfaunal zonations of the Gault Clay in south east England. In the Boreal Lower Cretaceous (eds Casey, R. & Rawson, P. F.), pp. 267–88. Geological Journal Special Issue no. 5. Liverpool: Seel House Press.Google Scholar
Hesselbo, S. P. & Allen, P. A. in press. Major erosion surfaces in the basal Wealden Beds, Lower Cretaceous, south Dorset. Journal of the Geological Society of London (in press).Google Scholar
Hesselbo, S. P., Coe, A. L. & Jenkyns, H. C. 1990. Recognition and documentation of depositional sequences from outcrop: an example from the Aptian and Albian of the Wessex Basin. Journal of the Geological Society of London 147, 549–59.CrossRefGoogle Scholar
Hesselbo, S. P., Coe, A. L., Batten, D. J. & Wach, D. J. 1990. Stratigraphic relations of the Lower Greensand in the Calne area, Wiltshire. Proceedings of the Geologists' Association 101, (in press).CrossRefGoogle Scholar
Jukes-Browne, A. J. & Hill, W. 1900. the Cretaceous rocks of Britain. 1. The Gault and Upper Greensand of England. Memoirs of the Geological Survey of Great Britain, 568 pp., 8 plates.Google Scholar
Kennedy, W. J. & Garrison, R. E. 1975. Morphology of nodular phosphates in the Cenomanian Glauconitic Marl of South east England. Lethaia 8, 339–60.CrossRefGoogle Scholar
Owen, H. G. 1971. Middle Albian stratigraphy in the Anglo-Paris Basin. Bulletin of the British Museum (Natural History) Geology, Supplement 8, 1–164.CrossRefGoogle Scholar
Owen, H. G. 1976. The stratigraphy of the Gault and Upper Greensand of the Weald. Proceedings of the Geologists' Association 86, 475–98.CrossRefGoogle Scholar
Penn, I. E. 1987. Geophysical logs in the stratigraphy of Wales and adjacent offshore and onshore areas. Proceedings of the Geologists' Association 98, 275–314.CrossRefGoogle Scholar
Penn, I. E., Chadwick, R. A., Holloway, S., Roberts, G., Pharoah, T. C, Allsop, J. M., Hulbert, A. G. & Burns, I. M. 1987. Principal features of the hydro-carbon prospectivity of the Wessex-Weald Basin, U.K. In Petroleum Geology of NW Europe (eds Brooks, J. and Glennie, K. W.), pp. 109–19. London: Graham & Trotman.Google Scholar
Ruffell, A. H. 1990. Mineralogy and petrography of the Sulphur Band phosphates at Folkestone, Kent. Proceedings of the Geologists' Association 101, 79–84.CrossRefGoogle Scholar
Ruffell, A. H. & Wignall, P. B. 1990. Depositional trends in the Upper Jurassic–Lower Cretaceous along the northern margin of the Wessex Basin. Proceedings of the Geologists' Association 101, (in press).CrossRefGoogle Scholar
Schlee, J. S. (ed.) 1984. Inter-regional unconformities and hydrocarbon accumulations. American Association of Petroleum Geologists, Memoir no. 36.CrossRefGoogle Scholar
Taitt, A. H. & Kent, P. E. 1958. Deep boreholes at Portsdown and Henfield. London: British Petroleum Technical Publication.Google Scholar
van Wagoner, J. C, Posamentier, H. W., Mitchum, R. M., Sarg, J. F., Loutit, T. S. & Hardenbol, J. 1988. An overview of the fundamentals of sequence stratigraphy and key definitions. In Sea-level changes: an integrated approach (eds Wilgus, C. K. et al. ), pp. 39–45. Society of Economic Palaeontologists and Mineralogists Special Publication no. 42.CrossRefGoogle Scholar
White, H. J. O. 1921. A short account of the geology of the Isle of Wight. Memoirs of the Geological Survey of Great Britain.Google Scholar
Whittaker, A. 1985. (ed.) Atlas of onshore sedimentary basins in England and Wales: Post-Carboniferous Tectonics and Stratigraphy. Glasgow & London: Blackie.Google Scholar
Whittaker, A., Holliday, D. W. & Penn, I. E. 1985. Geophysical logs in British Stratigraphy. Special Report of the Geological Society of London no. 18, 1–74.Google Scholar
Wilgus, C. K., Hastings, B. S., Kendall, G. St. C., Posamentier, H. W., Ross, C. A. & van Wagoner, J. C. 1988. (eds) Sea-level changes: an integrated approach. Society of Economic Palaeontologists and Mineralogists Special Publication no. 42.CrossRefGoogle Scholar
Worssam, B. C. 1978. The stratigraphy of the Weald Clay. Report of the Institute of Geological Sciences no. 78/11, 28 pp.Google Scholar