Hostname: page-component-78c5997874-94fs2 Total loading time: 0 Render date: 2024-11-17T14:25:45.867Z Has data issue: false hasContentIssue false
  • English
  • Français

Tectonic ripples and associated minor structures in the Silurian rocks of Denbighshire, North Wales

Published online by Cambridge University Press:  01 May 2009

P. T. Warren ,
R. K. Harrison ,
H. E. Wilson ,
E. G. Smith  and
M. J. C. Nutt
P. T. Warren
Affiliation:
Institute of Geological Sciences, Leeds, 15
R. K. Harrison
Affiliation:
Institute of Geological Sciences, Leeds, 15
H. E. Wilson
Affiliation:
Institute of Geological Sciences, Leeds, 15
E. G. Smith
Affiliation:
Institute of Geological Sciences, Leeds, 15
M. J. C. Nutt
Affiliation:
Institute of Geological Sciences, Leeds, 15
Get access Rights & Permissions [Opens in a new window]

Summary

Structures affecting certain bedding planes, and simulating sedimentary ripples, have been found at a number of horizons in the Wenlock and Ludlow rocks of Denbighshire, North Wales. The megascopic appearance of the ripples, including their association with linear structures and their miscroscopical fabric are described in detail; and it is concluded that they are of tectonic origin, being manifestations of bedding-plane slip. The orientations of the ripples and other minor structures suggest that the stress responsible was the regional stress that produced folding, faulting and cleavage.

Type
Articles
Information
Geological Magazine , Volume 107 , Issue 1 , January 1970 , pp. 51 - 60
Copyright
Copyright © Cambridge University Press 1970

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

REFERENCES

Boswell, P.G.H. 1949. The Middle Silurian Rocks of North Wales. Edward Arnold, LondonGoogle Scholar
Griggs, D.T., Turner, F.J. & Heard, H.C. 1960. Deformation of rocks at 500° to 800°C. Mem. geol. Soc. Am. 79, 39–104.Google Scholar
Jones, O.T. 1937. On the sliding or slumping of submarine sediments in Denbighshire, North Wales, during the Ludlow Period. Q. Jl geol. Soc. Lond. 93, 241–283.CrossRefGoogle Scholar
Pitcher, W.S. & Read, H.H. 1959. The main Donegal Granite. Q. Jl geol. Soc., Lond. 114, 259–305.CrossRefGoogle Scholar
Prentice, J.E. & Williams, B.J. 1957. Slump-structures in the Ludlovian rocks of north Herefordshire. Proc. Geol. Ass. 68, 286–293.Google Scholar
Smith, E.G., Hawkins, T.R.W., Warren, P.T. & Wilson, H.E. 1965. A note on the pattern of faulting in the Ludlow rocks of north-western Denbighshire. Bull. geol. Surv. Gt Br. No. 23, 1–8.Google Scholar
Weir, J.A. 1968. Structural history of the Silurian rocks of the coast west of Gatehouse, Kirkcudbrightshire. Scott. J. Geol. 4, 31–52.CrossRefGoogle Scholar
Wilson, G. 1953. Mullion and rodding structures in the Moine Series of Scotland. Proc. Geol. Ass. 64, 118–151.CrossRefGoogle Scholar
Wood, A. 1958. Whitsun field meeting at Aberystwyth. Proc. Geol. Ass. 69, 28–31.CrossRefGoogle Scholar