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50 per cent 53-28 PRELIMINARY MAP albite andesitic argillite augite banded biotite Bowen Island group Burrard Inlet cent and plagioclase cent quartz cents CANADA DEPARTMENT chalcopyrite chert chlorite commonly conglomerate consists Creston D.S.P. QUEEN'S PRINTER deformation degrees east DEPARTMENT OF MINES deposits Dewar Creek area dipping faults feet wide feldspar content FINDLAY CREEK MAP-AREA fine-grained folds fossils fragments Gabbro Gambier group strata granite grey greywacke hornblende hornfels Horseshoe Bay inch interbedded intrusive Kitchener formation Kitsilano lavas less than 50 limy slates limy slates(5 lithological mafic minerals constitute mainly microcline feldspar comprise Middle Aldridge division minerals constitute less MINES AND TECHNICAL Ordovician orthoclase and microcline outcrops PAPER 53-28 PRELIMINARY pebbles phyllite plagioclase feldspar plutonic rocks quartz diorite quartzite RESTIGOUCHE COUNTIES rock types shear zone Silurian Silurian rocks subgreywackes subrounded SURVEY OF CANADA SURVEYS GEOLOGICAL SURVEY TECHNICAL SURVEYS GEOLOGICAL Tetagouche group tuffs unconformity VANCOUVER NORTH volcanic rocks White Creek batholith