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Map994A MagogWeedon Quebec In pocket
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anticline appears argillite basal conglomerate basic lava Beauceville group Beauceville slates beds black slate Bolton lavas boundary Bowker Lake breccia Caldwell group Caldwell quartzites Canada carbonate cent chlorite cleavage composition copper degrees east deposition Devonian drag-folds drift Dudswell Dudswell map-area dykes Eastern Townships erosion feldspar folded fossils Francis group gabbro Geol geological Glenbrooke group grains granite grit hill inches intensely sheared interbedded Lake Aylmer group Lake Memphremagog limestone Magog Magog River mass Massawippi massive matrix Memphremagog map-area mica miles minerals Missisquoi northeast northwest Ordovician Orford map-area outcrops overlie pebbles peridotite phenocrysts places Pond pyrite quarry quartz quartzite Quebec rhyolite Richmond map-area River road rocks schistose schists Scotstown Scotstown map-area sedimentary sericite shaft Sherbrooke Sherbrooke group Sherbrooke map-area Silurian slaty southwest strike north structure surface Surv Sutton Mountains syncline T. H. Clark thick trachytes unconformity valley Weedon width writer zone