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The palaeogeographical significance of lateral variations in the ratio of sandstone to shale and other features of the Aberystwyth Grits

Published online by Cambridge University Press:  01 May 2009

J. P. B. Lovell
J. P. B. Lovell
Affiliation:
Grant Institute of Geology, University of Edinburgh, West Mains Road, Edinburgh, EH9 3JW
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Summary

Statistical sampling of the Aberystwyth Grits, using a method previously employed in an analogous study of Tyee Formation, Oregon, shows an overall decrease in the ratio of sandstone to shale from south-west to north-east, away from the supposed source of depositing currents. Comparison with other methods of proximality evaluation in turbidite sequences indicates that at least in this case the ratio of sandstone to shale is the most sensitive indicator of palaeogeography.

Type
Articles
Information
Geological Magazine , Volume 107 , Issue 2 , March 1970 , pp. 147 - 158
Copyright
Copyright © Cambridge University Press 1970

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References

REFERENCES

Klein, G. de V. 1967. Paleocurrent analysis in relation to modern marine sediment dispersal patterns. Bull. Am. Ass. Petrol. Geol. 51, 366–382.Google Scholar
Kuenen, P.H. 1953. Graded bedding with observations on Lower Paleozoic rocks of Britain. Verhandel. Koninkl. Ned. Akad. Wetenschap., Afdel. Natuurk. Sect. I, 20, no. 3, 1–47.Google Scholar
Lovell, J.P.B. 1969a. Tyee Formation: undeformed turbidites and their lateral equivalents: mineralogy and paleography. Bull. geol. Soc. Am. 80, 9–22.CrossRefGoogle Scholar
Lovell, J.P.B. 1969b. Tyee Formation: a study of proximality in turbidites. J. sedim. Petrol. 39, 935–953.Google Scholar
Pettijohn, F.J. 1957. Sedimentary rocks. 2nd Edition. Harper and Brothers, New York.Google Scholar
Potter, P.E., & Pettijohn, F.J. 1963. Paleocurrents and basin analysis. Academic Press, New York.CrossRefGoogle Scholar
Walker, R.G. 1967. Turbidite sedimentary structures and their relationship to proximal and distal depositional environments. J. sedim. Petrol. 37, 25–43.CrossRefGoogle Scholar
Wood, A. & Smith, A.J. 1959. The sedimentation and sedimentary history of the Aberystwyth Grits (Upper Llandoverian). Q. Jl geol. Soc. Lond. 114, 163–195.CrossRefGoogle Scholar