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• W. S. Fyfe
  Department of Geology, University of Western Ontario, London, Ontario.

• R. Kerrich
  Department of Geology, University of Western Ontario, London, Ontario; Present address: Department of Geological Sciences, University of Saskatchewan, Saskatoon, Saskatchewan.

• S. R. Hicock
  Department of Geology, University of Western Ontario, London, Ontario.

• F. C. Colloza
  Department of Geology, University of Western Ontario, London, Ontario.