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Keywords from Image Description:
Fort la CorneLac de Gras kimberlites. en Schematic crosssection of volcaniclastic facies kimberlite pipes across Canada Note the difference between kimberlites from Lac de Gras and those at Fort la Corne own based on rough schematic image in book Drift Exploration in Glaciated Terrain on page Black Tusk Volcanoes of Canada Kimberlite