Onverwacht Group

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Onverwacht Group
Stratigraphic range: Paleoarchean
>3300 Ma
TypeGeological group
Sub-unitsSubunits
UnderliesFig Tree Formation
Thickness16,370 m (53,710 ft)
Lithology
PrimaryGreenstone belt
OtherVolcanic rock
Location
Coordinates25°48′S 31°00′E / 25.8°S 31.0°E / -25.8; 31.0Coordinates: 25°48′S 31°00′E / 25.8°S 31.0°E / -25.8; 31.0
RegionBarberton Greenstone Belt, Mpumalanga
Country South Africa
 Eswatini
ExtentKaapvaal Craton
South African Greenstone Belt.png
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.

Subdivision[edit]

The Onverwacht Group can be divided into two subgroups with six formations:

The fossils found in the Onverwacht Series are among the oldest found on Earth.[1]

See also[edit]

References[edit]

  1. ^ Engel et al., 1968

Bibliography[edit]

  • Engel, A.E.; B. Nagy; L.A. Nagy; C.G. Engel; G.O. Kremp, and C.M. Drew. 1968. Alga-Like Forms in Onverwacht Series, South Africa: Oldest Recognized Lifelike Forms on Earth. Science 161. 1005–1008. Accessed 2008-07-12. doi:10.1126/science.161.3845.1005 PMID 17812798

External links[edit]