Johnsonville crater

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
Johnsonville crater is located in the United States
Johnsonville crater
Location of the crater in South Carolina
Johnsonville crater is located in South Carolina
Johnsonville crater
Johnsonville crater (South Carolina)
Impact crater/structure
ConfidenceProven[1]
Not confirmed[2]
Diameter~11 km (6.8 mi)
Age35 ± 0.3 Ma
Late Eocene
ExposedYes
DrilledNo
Location
Coordinates33°49′N 79°22′W[1]
CountryUnited States
StateSouth Carolina
DistrictFlorence County
MunicipalityJohnsonville
Map of watershed showing Lynches River and Pee Dee River

References

Citations
  1. Mikheeva, 2017
  2. List of confirmed impact craters by name - Earth Impact Database

General bibliography
  • Mikheeva, Anna (2017). "The Complete Catalog of the Earth's Impact structures". Russian Academy of Sciences. p. 1. Retrieved 2019-04-02.


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