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Constraints on the significance of the Orlock Bridge Fault within the Scottish Southern Uplands: A discussion of “The Orlock Bridge Fault: a major Late Caledonian sinistral fault in the Southern Uplands terrane, British Isles” by T. B. Anderson and G. J. H. Oliver

  • J. D. Floyd (a1), P. Stone (a1), R. P. Barnes (a1) and B. C. Lintern (a1)

Extract

In their account of the Orlock Bridge Fault of Northern Ireland and its presumed continuation into the Scottish Southern Uplands (the Kingledores Fault) Anderson and Oliver (1986) provide welcome detail in support of major strike-slip movement. However, their identification of the Kingledores Fault as a line of massive strike-slip movement is based on a number of assumptions which are permissible only because biostratigraphical control is generally sparse. In particular the assertion that the Kingledores Fault is a “giant step in the diachronous southerly ascent of the turbidite base” is founded largely on a misinterpretation of evidence recorded by Peach and Horne (1899), Griffith and Wilson (1982) and others.

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References

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Anderson, T. B. 1962. The stratigraphy, sedimentology and structure of the Silurian rocks of the Ards Peninsula, County Down. Unpublished Ph.D. thesis, University of Liverpool.
Anderson, T. B. & Oliver, G. J. H. 1986. The Orlock Bridge Fault, a major Late Caledonian sinistral fault in the Southern Uplands terrane, British Isles. TRANS R SOC EDINBURGH: EARTH SCI 77, 203222.
Barnes, R. P., Anderson, T. B. & McCurry, J. A. 1987. Along-strike variation in the stratigraphical and structural profile of the Southern Uplands Central Belt in Galloway and Down. J GEOL SOC LONDON 144, 807–16.
Craig, L. E. 1984. Stratigraphy in an accretionary prism: the Ordovician rocks in North Down, Ireland. TRANS R SOC EDINBURGH: EARTH SCI 74, 183191.
Floyd, J. D. 1982. Stratigraphy of a flysch succession: the Ordovician of West Nithsdale, SW Scotland. TRANS R SOC EDINBURGH: EARTH SCI 73, 19.
Griffith, A. E. & Wilson, H. E. 1982. Geology of the country around Carrickfergus and Bangor. MEM GEOL SURV NORTH IREL, Sheet 29.
Kelling, G. 1961. The stratigraphy and structure of the Ordovician rocks of the Rhinns of Galloway. Q J GEOL SOC LONDON 117, 3775.
Kemp, A. E. S. 1985. The later (Silurian) sedimentary and tectonic evolution of the Southern Uplands accretionary terrain. Unpublished Ph.D. thesis, University of Edinburgh.
Knipe, R.J. & Needham, D.T. 1986. Deformation processes in accretionary wedges—examples from the SW margin of the Southern Uplands, Scotland. In Coward, M. P. & Ries, A. C. (eds) Collision Tectonics. GEOL SOC LONDON SPEC PUBL 19, 5165.
Leggett, J. K., McKerrow, W. S. & Eales, M. H. 1979. The Southern Uplands of Scotland: a Lower Palaeozoic accretionary prism. J GEOL SOC LONDON 136, 755770.
McAdam, A. D. & Tulloch, W. 1985. Geology of the Haddington district. MEM BR GEOL SURV.
Peach, B. N. & Horne, J. 1899. The Silurian rocks of Britain, 1, Scotland. MEM GEOL SURV UK.
Stone, P., Floyd, J.D., Barnes, R.P. & Lintern, B. C. 1986. Comment on: Is the Southern Uplands of Scotland really an accretionary prism? GEOLOGY 14, 10461047.
Stone, P., Floyd, J. D., Barnes, R. P. & Lintern, B. C. 1987. A sequential back-arc and foreland basin thrust duplex model for the Southern Uplands of Scotland. J GEOL SOC LONDON 144, 753764.

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Constraints on the significance of the Orlock Bridge Fault within the Scottish Southern Uplands: A discussion of “The Orlock Bridge Fault: a major Late Caledonian sinistral fault in the Southern Uplands terrane, British Isles” by T. B. Anderson and G. J. H. Oliver

  • J. D. Floyd (a1), P. Stone (a1), R. P. Barnes (a1) and B. C. Lintern (a1)

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