© Minister of Supply and Services Canada 1988
Available in Canada through

authorized bookstore agents and other bookstores
or by mail from

Canadian Government Publishing Centre
Supply and Services Canada

Ottawa, Canada K1A 0S9

and from

Geological Survey of Canada offices:

601 Booth Street
Ottawa, Canada K1A 0E8

3303-33rd Street N.W.,
Calgary, Alberta T2L2A7

100 West Pender Street
Vancouver, B.C. V6B1R8

A deposit copy of this publication is also available for reference
in public libraries across Canada

Cat. No. M46-421E Canada: $25.00
ISBN 0-660-12878-0 Other countries: $30.00

Price subject to change without notice

Critical reader

J.A. Roddick

Original manuscript received: 1984 - 05
Final version approved for publication: 1986 - 05

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