Bulletin of the National Speleological Society - ISSN 0146-9517
Number 17: 23-31 - December 1955

A publication of the National Speleological Society

Caves and Related Features of Michigan
William E. Davies


Michigan, long noted for its great area underlain by limestones, is an example of the effects of total glaciation on an ancient karst area. The few solution caves that do exist are in marl of comparatively recent origin. The description of the giant sinks in the Thunder Bay area reveals a process of rejuvenation by which the caves of tomorrow are being formed.

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