The Johnsonville crater or the Snow's Island crater is a circular geophysical feature situated at the junction of the Lynches River and the Pee Dee River in South Carolina, United States, which has been interpreted by some scientists as an impact crater. 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 8 miles (13 km) in diameter, but is not well defined at the surface. It was discovered by magnetic anomalies, 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] though the Earth Impact Database (EID) does not list it as confirmed.[2]
| Johnsonville crater | |
|---|---|
  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 / 33.817°N 79.367°W[1] |
| Country | United States |
| State | South Carolina |
| District | Florence County |
| Municipality | Johnsonville |
References
editCitations
edit- ^ a b c Mikheeva, 2017
- ^ a b List of confirmed impact craters by name - Earth Impact Database
General bibliography
edit- Mikheeva, Anna (2017). "The Complete Catalog of the Earth's Impact structures". Russian Academy of Sciences. p. 1. Retrieved 2019-04-02.
External links
edit- 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
 | This South Carolina state location article is a stub. You can help Wikipedia by expanding it. |
 | This article about an impact crater on Earth is a stub. You can help Wikipedia by expanding it. |