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Thrusting and other movements in the Durham Permian

Published online by Cambridge University Press:  01 May 2009

C. T. Trechmann
C. T. Trechmann
Affiliation:
Hudworth Tower, Castle Eden, Co. Durham.
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Abstract

The Permian in Durham is the most internally disturbed of the newer or covering beds of England. In deep borings it is a dark dolomitic rock full of sulphates and chlorides; at the surface it has quite a different appearance. The Permian and overlying Secondary beds seem to have been lowered by downwarping. During the subsequent differential uplift and denudation the area remained a land surface and the sulphates were removed by penetrating water, not by subaerial weathering. Horizontal and low angle thrusts occur in the Sunderland area above about the middle of the underlying Coal Measure basin. The movements may have been induced by diminution in rock volume following solution and segregation accompanied by attraction or packing together of the mass of the formation.

Type
Articles
Information
Geological Magazine , Volume 91 , Issue 3 , June 1954 , pp. 193 - 208
Copyright
Copyright © Cambridge University Press 1954

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References

REFERENCES

Lebour, G. A., 1886. Outlines of the Geology of Northumberland and Durham. 2nd ed. Newcastle on Tyne. (British Assoc. Adv. Sci. Official and Local Guide, 1889.)Google Scholar
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(1) A case of thrust and crush brecciation in the Magnesian Limestone of County Durham. Univ. Durham Phil. Soc. Mem., 1, 1909. Deals with the coast from Marsden to Trow Rocks.Google Scholar
(2) The Geology of North-East Durham and South-East Northumberland. Proc. Geol. Assoc., xxiv, 1913, 87–107. States that the thrusting is directed against the Lake District horst.Google Scholar
(3) The Stratigraphy and Tectonics of the Permian of Durham, Northern Area. Univ. Durham Phil. Soc. Proc., iv, pt. 5, 1912. Describes the Permian from Hawthorn Dene northwards. In the map, the reef knolls are not yet defined and the fossiliferous middle is not separated from the bedded middle on its western side.Google Scholar
(4) On sections in the Lower Permian rocks at Claxheugh. Trans. Nat. Hist. Soc. of Northumberland and Durham. New Series, v, pt. 1, 1918. Refers to my description of the anhydrite mass at Hartlepool and gives a photograph of the grooves on the underside of the Shell Limestone at Claxheugh.Google Scholar
(5) The Magnesian Limestone of Durham. Geol. Mag., lvi, 1919, 452–465. Discusses the segregation and possible separation of calcite from dolomite, and contains a photograph of Jean Jiveson's Rock as it then was.Google Scholar