The purpose of this book is to assist visitors in Canada's National Parks to get greater enjoyment from their experiences in these sanctuaries of nature. An understanding of the earth's crust and the geological processes that create majestic mountains, deep valleys, vast prairies and mighty rivers, increases the appreciation of these great forces of nature. It has been prepared by a scientist in terms that the average person can understand and is designed to be carried in the parks for convenient reference. Pictures from the chain of eighteen national parks across the country clearly identify many geological processes. ... It is intended that this Guide will provide basic information on geology which will be useful for the interpretation of other more specific publications on the geological features of individual national parks.