A. W. Owen, 2000. "Scotland: the Southern Uplands", A revised correlation of Ordovician Rocks in the British Isles, R. A. Fortey, D. A. T. Harpe, J. K. Ingham, A. W Owen, M. A. Parkes, A. W. A. Rushton, N. H. Woodcock
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With a few notable exceptions (e.g. Kelling 1961, 1962; Walton 1961; Williams 1962) very little modern work on the stratigraphy of the Ordovician of the Southern Uplands had been undertaken prior to 1972 and hence the area received scant attention in Williams et al. (1972). The area has subsequently been the focus of much new work, largely sparked by the publication of the accretionary prism model of McKerrow et al. (1977, see also Leggett et al. 1979) and greatly enhanced by the British Geological Survey Mapping Programme. Floyd (1996a) has rationalized the plethora of stratigraphical terms applied to the Ordovician of the Southern Uplands and identified the type sections of all the units which he has retained. His scheme is essentially followed herein (Table 1, Figs 21, 22).
The overall structure of the Southern Uplands has long been recognized to be a series of fault-bounded slices striking NE–SW with the succession in each slice mostly younging northwestwards but across the terrane multiple fault repetitions generally bring in progressively younger strata towards the SE of the region (Rushton et al. 1996a). The Southern Uplands is bounded to the north by the Southern Upland Fault except southwestwards where the Stinchar Valley Fault and, locally, the older Pyet Thrust mark the structural boundary (see Floyd 1994). Peach & Horne (1899) divided the area into the Northern, Central and Southern belts; broad divisions which still have considerable value.
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A revised correlation of Ordovician Rocks in the British Isles
This Report is revised and expanded from the 1972 publication providing an up-to-the-minute account of the British Ordovician formations and their correlation nationally and internationally. It also includes the most comprehensive treatment of Ireland ever attempted. The reference list of a comprehensive bibliography of papers on the subject published since 1970.
The British sections are the type for the Ordovician System and classical in stratigraphical, tectonic and volcanic studies. The Charts bring together 30 years of research over the period in which plate tectonics has revolutionized our understanding of the Lower Palaeozoic rocks of the British Isles.
This Special Report will be a valuable reference for research and applied geoscientists working with rocks of Ordovician age. It will be of particular interest to those working in, or visiting, the Welsh mountains and the English Lake District.