The Quarterly Journal of the Geological Society of London, Volumen 109

analysed aperture arenaceous Assynt basaltic beds biotite biserial boulder-bed Bullion band caledonoid Cambrian camptonite Canisp Carboniferous chambers charnoid chlorite composition compression crystals Cushman d'Orbigny deposits described Devonian Dinas fault dolerites Duncorn Hill dykes Dyrham earth east evidence fauna faunal band feet felspar Flaggy Series folds Foraminifera forms fossils Fuller's Earth gabbro genus Geol geological gneiss goniatites granitic gneiss Grit Group Gumba Highlands horizon hornblende igneous rocks intrusions Kiahera Kiakanga lamprophyres later lava layer limestone linear structures lineation localities Loch magma margin metamorphism metasomatism migmatite miles minerals Moine thrust-plane north-west occur ocean Oeol oligoclase oligoclase-biotite-quartz-gneiss oligoclase-dolerites Ornithella outcrop parallel pegmatite pelitic phenocrysts plagioclase post-Cambrian potash-felspar Pre-Cambrian present pyroxene quartz quartzite Reuss Rugitela Rusinga Sandstone schists sediments Shales shown sills similar Slieve species specimens suggested surface tectonic texture thickness thin thrust tillite trend triserial tuff-with-blocks tuffs Upper variation volcanic whorl