Snows Island Crater
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Snows Island Crater is a large impact crater that has been identified at the junction of Lynches River and the Pee Dee River in South Carolina. Snows Island, at that point, is believed to be the upthrust of the center after the impact. This eight mile wide crater is not well defined at the surface and was discovered by magnetic anomalies and confirmed by study of well drilling cores. Impact breccia was found in these cores. This crater is close to circular, not oval like the younger Carolina bays.
No scientific studies have been conducted on the Snows Island feature, and the basic geomorphic evidence points to a much less catastrophic mode of formation. Should anyone have scientific citations or real evidence, please place them here.