It is one of the 38th parallel structures, a series of circular geophysical features stretching across the central United States which have been hypothesized to be the remnants of an ancient serial impact event.

The Decaturville crater is 6 kilometres (3.7 mi) in diameter and is estimated to be less than 300 million years old (dating to the Permian or younger).

[1] The effect that the impact had on the surrounding bedrock can be seen in a roadcut that runs along Highway 5 about 16 miles north of Lebanon.

Their work was reported in a 1979 U.S. Geological Survey Professional Paper that provides the most detailed description to date.

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