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Sketch of sedimentary rock strata from William Logans notebook
Source: Library and Archives Canada/Geological Survey of Canada collection/RG 45, Vol. 158, Field Notebook: 1970
© Library and Archives Canada
nlc-11029
Source: Library and Archives Canada/Geological Survey of Canada collection/RG 45, Vol. 158, Field Notebook: 1970
© Library and Archives Canada
nlc-11029