The Quarterly Journal of the Geological Society of London, Volumen 122

acmite albite andalusite Bala Ballydeenlea basalt basin biotite breccia Caradocian Carboniferous cent Chalk chlorite clay composition Connemara correlation crust crystals cycles cyclothems Dalradian Dalsheidi Dartmouth Beds dates dead population deposits Devonian erosion eustatic evidence Expt facies fault fauna feldspar formation fossils garnet Geological Glyn Gower gneisses granite growth growth-rate hematite Hirnant hornblende intrusions isograd isotopic Jl geol K-Ar Kenya kyanite Kyoga Lake layer Limestone liquid living population Lond lower magma magnetite margins metamorphism minerals Miocene mortality Mudstones nepheline occur Old Red Sandstone Ordovician Oughterard Oughterard granite outcrop outlier Palaeozoic palagonite peaks phase Pleistocene Powder present Proc pyroxene quartz ratio recruitment region Rhiwlas Rhiwlas Limestone rocks samples sedimentary sediments sequence shale sillimanite siltstones slates stratigraphical structure subsidence suggested Surv tectonic temperature thick trilobites tuff tuffisite Uganda upper mantle valley vapour volcanic Wales waveguide Wembury xenoliths zone