Portraying Geological Structure of Canadian Coalfields

OF all Canada's mineral resources, its coal deposits have probably received the most continued attention by the Geological Survey since its inception ninety years ago. A casual review of the many geological maps of coal areas by the Geological Survey will show how geological and topographical detail on the maps has gradually increased to meet the ever urgent demands of the mining industry.
Keywords: celluloid, contour map, geological map, Geological Survey-as, Hillcrest coal, Coal, Coal seams, Data, formation, Maps, Model, Models, Sheet, Structure, Surveys
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