Johnsonville crater
The Johnsonville crater or the Snow's Island crater is a circular geophysical feature that has been interpreted by some scientists as an impact crater, situated at the junction of Lynches River and the Pee Dee River in South Carolina. Snow's 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 supported by the study of well drilling cores. Supposed impact breccia was found in these cores. The Russian Academy of Sciences lists the structure as a proven impact crater,[1] however the Earth Impact Database (EID) does not list it as confirmed.[2]
  Location of the crater in South Carolina  Johnsonville crater (South Carolina) | |
| Impact crater/structure | |
|---|---|
| Confidence | Proven[1] Not confirmed[2] |
| Diameter | ~11 km (6.8 mi) |
| Age | 35 ± 0.3 Ma Late Eocene |
| Exposed | Yes |
| Drilled | No |
| Location | |
| Coordinates | 33°49′N 79°22′W[1] |
| Country | United States |
| State | South Carolina |
| District | Florence County |
| Municipality | Johnsonville |
Map of watershed showing Lynches River and Pee Dee River
References
- Mikheeva, 2017
- List of confirmed impact craters by name - Earth Impact Database
Bibliography
- Mikheeva, Anna. 2017. The Complete Catalog of the Earth's Impact structures, 1. Russian Academy of Sciences. Accessed 2019-04-02.
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
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