Quetico is the name of a provincial park in Northwestern Ontario, situated near the international border between Fort Frances and the Lakehead. It forms part of the vast Precambrian formation, which covers a great part of Canada. Most of what Mr. Meen says in his little book on the geological features of the park is valid for other areas and therefore tourists in other regions than Quetico will also find enjoyment and instruction in this brief, but very understandable geological treatise for the layman.