Flynn Creek crater is an impact crater situated in Jackson County, Tennessee, approximately 8 km south of Gainesboro. The impact crater was formed approximately 360 million years ago as a shallow, saucer-shaped crater, 3.8 kilometres in diameter and about 150 metres deep. A large central hill, highly deformed rim strata, and a breccia lens 40 m …Flynn Creek crater is an impact crater situated in Jackson County, Tennessee, approximately 8 km south of Gainesboro. The impact crater was formed approximately 360 million years ago as a shallow, saucer-shaped crater, 3.8 kilometres in diameter and about 150 metres deep. A large central hill, highly deformed rim strata, and a breccia lens 40 m in thickness were produced during formation. Over 2 square kilometres of flat lying Middle and Upper Paleozoic limestone and dolomite were brecciated and mixed to a depth of 200 m, and at least half of the breccia was ejected from the crater. The remaining breccia contains fragments ranging in size from small grains to megabreccia blocks 100 m long. Undisturbed strata lie 100 metres below the original crater floor.
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