Calvin impact crater

View on map:41.830000°N 85.950000°W

Description

Calvin is an impact crater located in Calvin Township, Cass County in the U.S. state of Michigan. It was discovered in 1987 by Randall Milstein of the Michigan Geological Survey while examining data from about 100 test wells drilled in the area.

References

http://en.wikipedia.org/wiki/Calvin crater

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