The Johnsonville crater or the Snow's Island crater is a circular geophysical feature situated at the junction of the

Lynches River Lynches River, named for Thomas Lynch, Jr., signer of the Declaration of Independence, rises in North Carolina near Waxhaw, North Carolina, at about 700 feet (210 m) elevation, flowing only a short distance to the South Carolina border, and th ...

and the

Pee Dee River The Pee Dee River, also known as the Great Pee Dee River, is a river in the Carolinas of the United States. It originates in the Appalachian Mountains in North Carolina, where its upper course, above the mouth of the Uwharrie River The Uwharri ...

South Carolina )''Animis opibusque parati'' ( for, , Latin, Prepared in mind and resources, links=no) , anthem = " Carolina";" South Carolina On My Mind" , Former = Province of South Carolina , seat = Columbia , LargestCity = Charleston , LargestMetro = ...

, United States, which has been interpreted by some scientists as an

impact crater An impact crater is a circular depression in the surface of a solid astronomical object formed by the hypervelocity impact of a smaller object. In contrast to volcanic craters, which result from explosion or internal collapse, impact craters ...

. Snow's Island, at that point, is believed to be the upthrust formed at the center of the crater after the impact. The structure is approximately in diameter, but is not well defined at the surface. It was discovered by magnetic anomalies, supported by the study of

well A well is an excavation or structure created in the ground by digging, driving, or drilling to access liquid resources, usually water. The oldest and most common kind of well is a water well, to access groundwater in underground aquifers. The ...

drilling Drilling is a cutting process where a drill bit is spun to cut a hole of circular cross-section in solid materials. The drill bit is usually a rotary cutting tool, often multi-point. The bit is pressed against the work-piece and rotated at ra ...

cores. Supposed impact

breccia Breccia () is a rock composed of large angular broken fragments of minerals or rocks cemented together by a fine-grained matrix. The word has its origins in the Italian language, in which it means "rubble". A breccia may have a variety of di ...

was found in these cores. The

Russian Academy of Sciences The Russian Academy of Sciences (RAS; russian: Росси́йская акаде́мия нау́к (РАН) ''Rossíyskaya akadémiya naúk'') consists of the national academy of Russia; a network of scientific research institutes from across t ...

lists the structure as a proven

,Mikheeva, 2017 though the

Earth Impact Database The Earth Impact Database is a database of confirmed impact structures or craters on Earth. It was initiated in 1955 by the Dominion Observatory, Ottawa, under the direction of Carlyle S. Beals. Since 2001, it has been maintained as a not-for-pr ...

(EID) does not list it as confirmed.List of confirmed impact craters by name
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References

Citations

General bibliography

External links

An Impact Crater in Northeast South Carolina

''The Johnsonville Impact Crater, South Carolina: Petrologic Evidence of Shock Metamorphism from Core Samples'', The Smithsonian/NASA Astrophysics Data System
Eocene impact craters Impact craters of the United States Landforms of Florence County, South Carolina Possible impact craters on Earth {{SouthCarolina-geo-stub