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Journal of the Geological Society

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Short Paper: Arc detritus in the Southern Uplands: mineralogical characterization of a ‘missing’ terrane

¹ British Geological Survey, Keyworth, Nottingham NG12 5GG, UK
² British Geological Survey, Murchison House, West Mains Road, Edinburgh EH9 3LA, UK

Within the late Ordovician-early Silurian Southern Uplands thrust belt, quartzo-feldspathic greywackes derived from the north are interbedded with volcanic-rich greywackes of southerly provenance. Abundant fresh clinopyroxenes which occur in the latter, both as single crystals and phenocrysts in lithic fragments, have compositions that indicate a calc-alkaline island arc origin.

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