Onverwacht Group
| Onverwacht Group | |
|---|---|
| Stratigraphic range: Paleoarchean > | |
| Type | Geological group |
| Sub-units | Subunits |
| Underlies | Fig Tree Formation |
| Thickness | 16,370 m (53,710 ft) |
| Lithology | |
| Primary | Greenstone belt |
| Other | Volcanic rock |
| Location | |
| Coordinates | 25°48′S 31°00′E / 25.8°S 31.0°E |
| Region | Barberton Greenstone Belt, Mpumalanga |
| Country | South Africa, Eswatini |
| Extent | Kaapvaal craton |
Location of the Barberton Greenstone Belt | |
The Onverwacht Group or Onverwacht Series is a series of greenstone belts and volcanic rock formations from the Archean Eon in the Kaapvaal craton in South Africa and Eswatini.
A well known part of the Onverwacht Series is visible in the Komati valley, located in the east of the Transvaal region.