Hostname: page-component-848d4c4894-2xdlg Total loading time: 0 Render date: 2024-06-16T23:24:17.466Z Has data issue: false hasContentIssue false
  • English
  • Français

Overbank deposits of the Narrator Brook, Dartmoor, England

Published online by Cambridge University Press:  01 May 2009

B. Gomez  and
P. C. Sims
B. Gomez
Affiliation:
Department of Geography, The University, Southampton, Hants SO9 5NH
P. C. Sims
Affiliation:
Department of Geographical Sciences, Plymouth Polytechnic, Plymouth, Devon PL4 8AA
Get access Rights & Permissions [Opens in a new window]

Summary

Overbank deposits of the Narrator Brook, exposed by the excavation of a drainage ditch, are described. The deposits, which consist of coarse (sand and gravel), fine (silt and clay) and peat units, were laid down in a floodbasin environment. The coarse units are interpreted as crevasse-splay deposits, rather than being classified as floodbasin sediments along with the fine units. Three stages of development in the evolution of the floodbasin are identified. The first stage is represented by the development of peat at a time when the area was not subjected to flooding, the second by deposition of the fine and coarse sediment units and the third by an upper peat horizon. No precise date for the formation of the deposits is at present available, but it is thought that they may be the result of man's activity in the catchment.

Type
Articles
Information
Geological Magazine , Volume 118 , Issue 1 , January 1981 , pp. 77 - 82
Copyright
Copyright © Cambridge University Press 1981

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. 1965. A review of the origin and characteristics of recent alluvial sediments. Sedimentology 5 89–191.CrossRefGoogle Scholar
Allen, J. R. L. 1970. Physical Processes of Sedimentation. London: Allen and Unwin.Google Scholar
Coleman, J. M. & Gagliano, S. M. 1965. Sedimentary Structures: Mississippi river delta plain. In Primary Sedimentary Structures and their hydrodynamic interpretation. Society of Economic Palaeontologists and Mineralogists. Spec. publ. No. 12 (ed. Middleton, G. B.), pp. 133–48. 'Tulsa, Oklahoma.CrossRefGoogle Scholar
Cook, R. M. L., Greeves, T. A. P. & Kilvington, C. C. 1973. Eylesbarrow (1814–1852). Rep. Trans. Devon Ass. Advmt Sci. 106 161–214.Google Scholar
Daley, B. 1973. Fluvio-lacustrine cyclothems from the Oligocene of Hampshire. Geol. Mag. 110 235–42.CrossRefGoogle Scholar
Greeves, T. A. P. 1969. A mine in the Deancombe Valley. Rept Trans. Devon Ass. Advmt Sci. 102 197–201.Google Scholar
Gregory, K. J. & Walling, D. E. 1973. Drainage Basin Form and Process. London: Arnold.Google Scholar
Lattman, L. H. 1960. Cross-section of a floodplain in a moist region of moderate relief. J. Sedim. Petrol. 30 275–82.Google Scholar
McGowen, J. H. & Garner, L. E. 1970. Physiographic features and stratification types of coarse-grained point bars: modern and ancient examples. Sedimentology 14 77–111.CrossRefGoogle Scholar
Simmons, I. G. 1964. An ecological history of Dartmoor in Dartmoor Essays (ed. Simmons, I. G.), pp. 191–215. Exeter: Devonshire Association.Google Scholar
Smith, N. D. 1974. Sedimentary and bed formation in the Upper Kicking Horse River, a braided outwash stream. J. Geol. 82 205–23.CrossRefGoogle Scholar
Wentworth, C. 1922. A scale of grade and class terms for clastic sediments. J. Geol. 30 277–92.CrossRefGoogle Scholar