The stratigraphy of the mid Cretaceous (Albian) Upper Greensand Formation of the Wessex Basin and South West England, UK

• Autorzy: Gallois R. , Owen H.

Identyfikatory

DOI

10.1515/agp-2018-0003

• Języki publikacji: EN

Abstrakty

EN

The Upper Greensand Formation, mostly capped by the Chalk, crops out on the edges of a broad, dissected plateau in Devon, west Dorset and south Somerset and has an almost continuous outcrop that runs from the Isle of Purbeck to the Vale of Wardour in south Wiltshire. The Formation is well exposed in cliffs in east Devon and the Isle of Purbeck, but is poorly exposed inland. It comprises sandstones and calcarenites with laterally and stratigraphically variable amounts of carbonate cement, glauconite and chert. The sedimentology and palaeontology indicate deposition in marginal marine-shelf environments that were at times subject to strong tidal and wave-generated currents. The formation of the Upper Greensand successions in the region was influenced by penecontemporaneous movements on major fault zones, some of which are sited over E-W trending Variscan thrusts in the basement rocks and, locally, on minor faults. Comparison of the principal sedimentary breaks in the succession with the sequence boundaries derived from world-wide sea-level curves suggests that local tectonic events mask the effects of any eustatic changes in sea level. The preserved fauna is unevenly distributed, both laterally and stratigraphically. Bivalves, gastropods and echinoids are common at some horizons but are not age-diagnostic. Ammonites are common at a few stratigraphically narrowly defined horizons, but are rare or absent throughout most of the succession. As a result, the age of parts of the succession is still poorly known.

Słowa kluczowe

EN

stratigraphy; Upper Greensand Formation; Cretaceous; Devon; Dorset; Wessex; Albian Stage; Cenomanian Stage; sequence stratigraphy

PL

stratygrafia; formacja; kreda; dewon; Dorset; Wessex; alb; cenoman

• Wydawca: Faculty of Geology of the University of Warsaw ; Komitet Nauk Geologicznych PAN
• Czasopismo: Acta Geologica Polonica
• Rocznik: 2018
• Tom: Vol. 68, no. 2
• Strony: 161--180
• Opis fizyczny: Bibliogr. 49 poz., rys., tab.

Twórcy

autor

Gallois R.

• 92 Stoke Valley Rd., Exeter, UK

autor

Owen H.

• Department of Earth Sciences, Natural History Museum, Cromwell Rd, London, UK

Bibliografia

• 1. Arkell, W.J. 1947. The Geology of the Country around Weymouth, Swanage, Corfe and Lulworth. Memoirs of the Geological Survey of Great Britain. HMSO; London.
• 2. Amedro, F. 2009. Stratigraphie séquentielle des successions Albiennes du Bassin Anglo-Parisien et du Bassin de Mons. Bulletin d’Information des Géologues du Bassin de Paris, 46, 12-36.
• 3. Bristow, C.R., Barton, C.M., Freshney, E.C., Wood, C.J., Evans, D.J., Cox, B.M., Ivimey-Cook, H.C. and Taylor, R.T. 1995. Geology of the country around Shaftesbury. Memoir of the Geological Survey. HMSO; London.
• 4. Bristow, C.R. and Owen, H.G. 1991 A temporary section in the Gault at Fontmell Magna, north Dorset. Proceedings of the Dorset Natural History and Archaeological Society, 112, 95-97.
• 5. Carter, D. and Hart, M.B. 1977. Aspects of mid-Cretaceous stratigraphical micropalaeontology. Bulletin of the British Museum (Natural History), Geology, 29, 1-135.
• 6. Chadwick, R.A. and Evans, D.J. 2005. A seismic atlas of Southern Britain. British Geological Survey Occasional Publication No. 7. British Geological Survey; Keyworth.
• 7. Downes, W. 1882. The zones of the Blackdown Beds and their correlation with those at Haldon, with a list of fossils. Quarterly Journal of the Geological Society, 38, 75-94.
• 8. Drummond, P.V.O. 1967. PhD The Cenomanian paleogeography of Dorset and adjacent counties. Unpublished PhD thesis, University of London.
• 9. Drummond, P.V.O. 1970. The Mid-Dorset Swell. Evidence of Albian-Cenomanian movements in Wessex. Proceedings of the Geologists’ Association, 81, 679-714.
• 10. Gallois, R.W. 2004. The stratigraphy of the Upper Greensand (Cretaceous) of south-west England. Geoscience in southwest England, 11, 21-29.
• 11. Gallois, R.W., Morter, A.M. and Owen, H.G. 2016. The stratigraphy of the Gault Formation (Early Cretaceous, Albian) in East Anglia and south-east England. Proceedings of the Geologists’ Association, 127, 606-628.
• 12. Gallois, R.W. and Owen, H.G. 2017. The stratigraphy of the Upper Greensand Formation (Albian, Cretaceous) of the Isle of Purbeck, Dorset, UK. Acta Geologica Polonica, 67, 405-424.
• 13. Gallois, R.W. and Owen, H.G. in press. The Stratigraphy of the Gault and Upper Greensand Formations (Albian Stage, Cretaceous) of the Dorset and East Devon Coast World Heritage Site, U.K. Proceedings of the Geologists’ Association.
• 14. Garrison, R.E., Kennedy, W.J. and Palmer, T.J. 1987. Early lithification and hardgrounds in Upper Albian and Cenomanian calcarenites, Southwest England. Cretaceous Research, 8, 103-140.
• 15. Glennie, K.W. and Underhill, J.R. 1998. Origin, development and evolution of structural styles. In: Glennie, K.W. (Ed.), 42-82. Petroleum geology pf the North Sea, 4th edition. Blackwell Science, Oxford.
• 16. Hamblin, R.J.O. and Wood, C.J. 1976. The Cretaceous (Albian-Cenomanian) stratigraphy of the Haldon Hills, south Devon, England. Newsletters in Stratigraphy, 4, 135-149.
• 17. Hancock, J.M. 1969. Transgression of the Cretaceous sea in south-west England. Proceedings of the Ussher Society, 2, 61-83.
• 18. Hancock, J.M. 1989. Sea level changes in the British region during the Late Cretaceous. Proceedings of the Geologists’ Association, 100, 565-594.
• 19. Hart, M.B. 1994. The Mid-Dorset Swell: a re-assessment. Proceedings of the Ussher Society, 8, 308-312.
• 20. Hart, M.B. 1980. The recognition of mid-Cretaceous sea-level changes by means of foraminifera. Cretaceous Research, 1, 289-297.
• 21. Haq, B.U. 2014. Cretaceous eustasy revisited. Global Planetary Change 113, 44-58.
• 22. Haq, B.U., Hardenbol. J, and Vail, P.R. 1988. Mesozoic and Cenozoic chronostratigraphy and cycles of sea level change. In: Wilgus, C.K., Hastings, B.S., Kendall, C.G.St.C., Ross, C.A. and Van Wagoner, J.C. (Eds), 7-108. Sea-level changes: an integrated approach. Society of Economic Paleontologists and Mineralogists Special Publication 42.
• 23. Hesselbo, S.P., Coe, A.L. and Jenkyns, H.C. 1990. Recognition and documentation of depositional sequences from outcrop: an example from the Aptian and Albian on the eastern margin of the Wessex Basin. Journal of the Geological Society, London, 147, 549-559.
• 24. House, M.R. 1989. Geology of the Dorset Coast. Geologists’ Association Guide No. 22. Scottish Academic Press; Edinburgh.
• 25. Jeans, C.V., Merriman, R.J., Mitchell, J.G. and Bland, D.J. 1982. Volcanic clays in the Cretaceous of southern England and northern Ireland. Clay Minerals, 17, 105-156.
• 26. Jukes-Browne, A.J. and Hill, W. 1900. The Cretaceous rocks of Britain. Vol. I, The Gault and Upper Greensand of England. Memoirs of the Geological Survey of the United Kingdom. HMSO; London.
• 27. Kennedy, W.J. 1970. A correlation of the uppermost Albian and the Cenomanian of south-west England. Proceedings of the Geologists’ Association, 81, 613-677.
• 28. Lott, G.K., Knox, R.W.O’B., Bigg, P.J., Davey, R.J. and Morton, A.C. 1980. Aptian-Cenomanian stratigraphy in boreholes from offshore south-west England. Institute of Geological Sciences Report No. 80/8.
• 29. Miall, A.D. 1992 Exxon global cycle chart: An event for every occasion? Geology, 20, 787-790.
• 30. Morter, A.A. 1981. The macrofauna of the Lower Cretaceous rocks of the Winterborne Kingston borehole , Dorset. Institute of Geological Sciences Report 81/3, 35-38.
• 31. Mortimore, R.N., Wood, C.J. and Gallois, R.W. 2001. British Upper Cretaceous Stratigraphy. Geological Conservation Review Series, No. 24. Joint Nature Conservation Committee; Peterborough.
• 32. Owen, H.G. 2012. The Gault Group (Early Cretaceous, Albian), in East Kent, S.E. England; its lithology and ammonite biozonation. Proceedings of the Geologists’ Association, 123, 742-765.
• 33. Owen, H. G. 2014. Discussion of Aldiss, D. Under representation of faults on geological maps of the London region: reasons, consequences and solutions. Proceedings of the Geologists’ Association. 125, 493-498.
• 34. Robbie, J.A., Wilson, V, Green, G.W., Kellaway, G.A., Welch, F.B.A. and Buchan, S. 1973. Yeovil, England and Wales Sheet 312, 1:50,000 scale reprint. Ordnance Survey for the Institute of Geological Sciences; Southampton.
• 35. Ruffell, A. 1991. Sea-level events during the Early Cretaceous in western Europe. Cretaceous Research, 12, 527-551.
• 36. Selwood, E.B., Edwards, R.A., Simpson, S., Chesher, J.A., Hamblin, R.J.O., Henson, M.R., Riddolls, B.W. and Waters, R.A. 1984. Geology of the Country around Newton Abbott. Memoirs of the British Geological Survey. HMSO; London.
• 37. Smart, J.G.O. 1955. Geology of the Alton Pancras district of Dorset. Bulletin of the Geological Survey of Great Britain No. 9, 42-9.
• 38. Smith, A.B. and Wright, C.W. 1989-2012. British Cretaceous echinoids. Monograph of the Palaeontographical Society; London. 1-754, pls 1-253.
• 39. Smith, W.E. 1961. The detrital mineralogy of the Cretaceous rocks of S.E. Devon, with particular reference to the Cenomanian. Proceedings of the Geologists’ Association, 72, 303-331.
• 40. Smith, W.E. and Drummond, P.V.O. 1962. Easter field meeting; the Upper Albian and Cenomanian deposits of Wessex. Proceedings of the Geologists’ Association, 73, 335-352.
• 41. Spath, L.F. 1926. On the zones of the Cenomanian and uppermost Albian. Proceedings of the Geologists’ Association, 37, 430-432.
• 42. Taylor, J.D., Cleevely, R.J. and Morris, N.J. 1983. Predatory gastropods and their activities in the Blackdown Greensand (Albian) of England. Palaeontology, 26, 521-553.
• 43. Tresise, G.R. 1960. Aspects of the lithology of the Wessex Upper Greensand. Proceedings of the Geologists’ Association, 71, 316-339.
• 44. Tresise, G.R. 1961. The nature and origin of chert in the Upper Greensand of Wessex. Proceedings of the Geologists’ Association, 72, 333-356.
• 45. Vail, P.R., Mitchum, R.M. Jr. and Thompson, S.III. 1977. Seismic stratigraphy and global changes of sea level, part 3: relative changes in sea level from coastal onlap. In: Payton, C.E. (Ed.), 63-97. Seismic stratigraphy-applications to hydrocarbon exploration. Memoir of the American Association of Petroleum Geologists No. 26.
• 46. Welch, F.B.A., Robbie, J.A., Lloyd, W. and Buchan, S. 1974. Bridport, England and Wales Sheet 327, 1:50,000 scale reprint. Ordnance Survey for the Institute of Geological Sciences; Southampton.
• 47. White, H.J.O. 1923. The geology of the country south and west of Shaftesbury. Memoirs of the Geological Survey of Great Britain. HMSO; London.
• 48. Wilson, V., Welch, F.B.A., Robbie, J.A. and Green, G.W. 1958. Geology of the country around Bridport and Yeovil. Memoirs of the Geological Survey of Great Britain. HMSO; London.
• 49. Woods, M.A., Wood, C.J., Wilkinson, I.P. and Lott, G.K. 2009. The Albian-Cenomanian boundary at Eggardon, Dorset (England): an anomaly resolved? Proceedings of the Geologists’ Association, 120, 108-120.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).