|William E. Logan||First director GSC (1842-1869). Field work in Gaspé region. Structural break between Appalachian Mountains and Canadian Shield named for him.|
|Alexander Murray||Logan's first assistant and second member of GSC. Field work in Great Lakes region.|
|A.R.C. Selywn||Director Geological Survey of Victoria, Australia (1852-69). Second director GSC (1869-1895). Field work in Newfoundland and western Canada.|
|G.M. Dawson||Third director of GSC (1895-1901). Field work in British Columbia and the Yukon. Yukon city named for him during gold rush.|
|Robert Bell||Acting director GSC (1901-06). Began field work for GSC in 1859; field work in northern and western Canada.|
|A.P. Low||Neptune expedition leader to Hudson Bay and Arctic Islands region (1903-04). Field work in Hudson Bay and Labrador regions.|
|J.B. Tyrrell||Field work in Hudson Bay, Northwest and Yukon territories (1880-90s). Ancient glacial sea surrounding Hudson Bay named for him.|
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GO 521 © J.S. Aber (2013).