Vredefort impact structure
Largest verified impact structure on Earth, about 2 billion years old / From Wikipedia, the free encyclopedia
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The Vredefort impact structure is the largest verified impact structure on Earth.[1] The crater, which has since been eroded away, has been estimated at 170–300 kilometres (110–190 mi) across when it was formed.[2][3] The remaining structure, comprising the deformed underlying bedrock, is located in present-day Free State province of South Africa. It is named after the town of Vredefort, which is near its centre. The structure's central uplift is known as the Vredefort Dome. The impact structure was formed during the Paleoproterozoic Era, 2.023 billion (± 4 million) years ago. It is the second-oldest known impact structure on Earth, after Yarrabubba.
Vredefort impact structure | |
---|---|
Vredefort Dome | |
Impact crater/structure | |
Confidence | Confirmed |
Diameter | 170–300 km (110–190 mi) (estimated former crater diameter) |
Age | 2023 Ma ± 4 Ma Orosirian, Paleoproterozoic |
Exposed | Yes |
Drilled | Yes |
Location | |
Coordinates | 27°0′0″S 27°30′0″E |
Country | South Africa |
Province | Free State |
Official name | Vredefort Dome |
Includes |
|
Criteria | Natural: (viii) |
Reference | 1162 |
Inscription | 2005 (29th Session) |
Area | 30,000 ha (120 sq mi) |
In 2005, the Vredefort Dome was added to the list of UNESCO World Heritage Sites for its geologic interest.