Field and Laboratory

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In describing the crater-like depression a quarter of a mile south of Tiffin, Iowa, Professor C. C. Wylie emphasized the need for criteria to distinguish depressions caused by meteoritic explosions from those formed by other agencies. He was able to show that this elliptical depression 100 ft. long, 75 ft. across, and about eight feet deep, is not a sink hole, buffalo wallow, artificial pond, or initial depression in glacial drift.… rofessor Wylie considered the possibility of a meteoritic origin, but was unable to discover convincing field evidence to support this hypothesis. The writers suggest that Tiffin Hole is a swirl pit formed during a past flood of Clear Creek.

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