Hostname: page-component-cd9895bd7-dzt6s Total loading time: 0 Render date: 2024-12-23T23:59:15.903Z Has data issue: false hasContentIssue false
  • English
  • Français

Fluvio-lacustrine cyclothems from the Oligocene of Hampshire

Published online by Cambridge University Press:  01 May 2009

B. Daley
B. Daley
Affiliation:
Geology Division, Department of Chemistry and Geology, Portsmouth Polytechnic, Portsmouth PO1 3QL
Get access Rights & Permissions [Opens in a new window]

Summary

Each fluvio-lacustrine cyclothem may include the following lithotypes (in ascending order): (a) irregularly laminated silts and muds; (b) regularly laminated muds and silts; (c) muds with or without molluscan partings and bands; (d) colour mottled muds. Each cycle reflects a change from flowing water conditions (fluvial) to non-flowing water conditions (lacustrine), culminating in some cases with the formation of marsh. Each lithotype is thought to represent the environmental changes which resulted from the silting up of inter-channel depressions on a flood plain. Successive cyclothems possibly reflect renewed flooding following an increase in river level during more pluvial periods.

Type
Articles
Information
Geological Magazine , Volume 110 , Issue 3 , May 1973 , pp. 235 - 242
Copyright
Copyright © Cambridge University Press 1973

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

Allen, J. R. L. 1964. Studies in fluviatile sedimentation: six cyclothems from the Lower Old Red Sandstone, Anglo-Welsh Basin. Sedimentology 3, 163–98.CrossRefGoogle Scholar
Allen, J. R. L. 1965. Fining-upwards cycles in alluvial successions. Geol. J. 4, 229–46.CrossRefGoogle Scholar
Baker, F. C. 1945. The Molluscan Family Planorbidae. Univ. Illinois Press, Urbana.Google Scholar
Clarke, G. R. 1961. The Study of the Soil in the Field. Clarendon Press, Oxford.Google Scholar
Coleman, J. M. 1966. Ecological changes in a massive freshwater sequence. Trans. Gulf-Cst. Ass. geol. Socs. 16, 159–74.Google Scholar
Coleman, J. M., Gagliano, S. M. & Webb, J. E. 1964. Minor sedimentary structures in a prograding distributary. Mar. Geol. 1, 240–58.CrossRefGoogle Scholar
Curry, D. 1966. Problems of Correlation in the Anglo–Paris–Belgian Basin. Proc. Geol. Ass. 77, 437–67.CrossRefGoogle Scholar
Daley, B. 1967. Pseudomorphs after gypsum from the Bembridge Marls. Proc. Geol. Ass. 78, 319–24.CrossRefGoogle Scholar
Daley, B. 1968. Sedimentary structures from a non-marine horizon in the Bembridge Marls (Oligocene) of the Isle of Wight, Hampshire, England. J. sediment. Petrol. 38, 114–27.Google Scholar
Daley, B. 1972. Macroinvertebrate assemblages from the Bembridge Marls (Oligocene) of the Isle of Wight, England, and their environmental significance. Palaeogeogr. Palaeoclimatol. Palaeoecol. 11, 11–32.CrossRefGoogle Scholar
Daley, B. 1973. The Palaeoenvironment of the Bembridge Marls (Oligocene) of the Isle of Wight, Hampshire. Proc. Geol. Ass. (In press).CrossRefGoogle Scholar
Duff, P. McL. D., Hallam, A. & Walton, E. K. 1967. Cyclic sedimentation. Developments in Sedimentology, 10. Elsevier, Amsterdam.Google Scholar
Moore, D. G. & Scruton, P. C. 1957. Minor internal structures of some recent unconsolidated sediments. Bull. Am. Ass. Petrol. Geol. 1, 2723–51.Google Scholar