Hostname: page-component-78c5997874-j824f Total loading time: 0 Render date: 2024-11-04T17:40:03.776Z Has data issue: false hasContentIssue false
  • English
  • Français

Volcanic pebbles from Pleistocene gravels in Norfolk and Essex

Published online by Cambridge University Press:  01 May 2009

R. W. Hey  and
P. J. Brenchley
R. W. Hey
Affiliation:
Sedgwick Museum, Cambridge
P. J. Brenchley
Affiliation:
Jane Herdman Laboratories of Geology, Brownlow Street, P.O. Box 147, Liverpool
Get access Rights & Permissions [Opens in a new window]

Summary

In the pre-Anglian Pleistocene of East Anglia and Essex are unfossiliferous gravels with pebbles of flint, quartz, quartzite, chert and volcanic rocks. All appear to belong to the Kesgrave Sands and Gravels of Rose & Allen (1976), which are largely or wholly fluviatile and probably of Beestonian age. Forty-six of the volcanic pebbles, from three different localities, have been examined microscopically. Almost all are fine-grained acid igneous rocks or vitric tuffs, evidently derived from a single suite. Various possible source-areas are considered, of which North Wales, with its Ordovician volcanics, is thought to be the most likely.

Type
Articles
Information
Geological Magazine , Volume 114 , Issue 3 , May 1977 , pp. 219 - 225
Copyright
Copyright © Cambridge University Press 1977

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

Bonney, T. G. 1900. The Bunter Pebble-beds of the Midlands and the source of their materials. Q. Jl geol. Soc. Lond. 56, 287–306.CrossRefGoogle Scholar
Brenchley, P. J. 1973. The Cwm Clwyd Tuff, North Wales: a palaeogeographical interpretation of some Ordovician ash-shower deposits. proc. Yorks. geol. Soc. 39, 199–224.CrossRefGoogle Scholar
Denaeyer, M. E. & Mortelmans, G. 1954. Les roches éruptives. In Prodrome d'une description géologique de la Belgique (ed. Fourmarier, P.), pp. 747–92. Soc. Géol. Belg., Liège.Google Scholar
Gregory, J. W. 1922. The Evolution of the Essex Rivers and of the Lower Thames. Colchester: Benham & Co.CrossRefGoogle Scholar
Hawkes, L. 1943. The erratics of the Cambridge Greensand — their nature, provenance and mode of transport. Q. Jl geol. Soc. Lond. 99, 93–104.CrossRefGoogle Scholar
Hey, R. W. 1976. Provenance of far-travelled pebbles in the pre-Anglian Pleistocene of East Anglia. Proc. Geol. Ass. 87, 69–82.CrossRefGoogle Scholar
Howitt, F., Aston, E. R. & Jacqué, M. 1975. The occurrence of Jurassic volcanics in the North Sea. In Petroleum and the Continental Shelf of North-west Europe, vol. 1 (ed. Woodland, A. W.), pp. 379–87. Applied Science Publishers Ltd.Google Scholar
Jacqué, M. & Thouvenin, J. 1975. Lower Tertiary tuffs and volcanic activity in the North Sea. In Petroleum and the Continental Shelf of North-west Europe, vol. 1 (ed. Woodland, A. W.), pp. 455–65. Applied Science Publishers Ltd.Google Scholar
Krinsley, D. H. & Funnell, B. M. 1965. Environmental history of quartz sand grains from the Lower and Middle Pleistocene of Norfolk, England. Q. Jl geol. Soc. Lond. 121, 435–61.CrossRefGoogle Scholar
Paterson, I. B. & Harris, A. L. 1969. Lower Old Red Sandstone ignimbrites from Dunkeld, Perthshire. Rep. Inst. Geol. Sci. 69 (7), 1–6.Google Scholar
Prestwich, J. 1890. On the relation of the Westleton Beds, or Pebbly Sands of Suffolk, to those of Norfolk, and on their extension inland. Q. Jl geol. Soc. Lond. 46, 84–154.CrossRefGoogle Scholar
Rose, J. & Allen, P. 1976. Middle Pleistocene stratigraphy in south-east Suffolk. Jl Geol. Soc. Lond. 133, 83–102.CrossRefGoogle Scholar
Rose, J., Allen, P. & Hey, R. W. 1976. Middle Pleistocene stratigraphy in southern East Anglia. Nature, Lond. 263, 492–4.CrossRefGoogle Scholar
Salter, A. E. 1905. On the superficial deposits of central and parts of southern England. Proc. Geol. Ass. 19, 1–56.CrossRefGoogle Scholar
Solomon, J. D. 1935. The Westleton Series of East Anglia: its age, distribution and relations. Q. Jl geol. Soc. Lond. 91, 216–38.CrossRefGoogle Scholar
Wills, L. J. 1950. The Palaeogeography of the Midlands. Liverpool University Press.Google Scholar
Woodward, H. B. 1881. The geology of the country around Norwich. Mem. geol. Surv. U.K.Google Scholar