Encyclopedia of Astrobiology

Living Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James Cleaves, Daniele Pinti, José Cernicharo Quintanilla, Michel Viso

Coonterunah Subgroup, Australia

Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27833-4_349-4

Definition

The Coonterunah Subgroup is one of the oldest well-preserved supracrustal sequences known on Earth. Located in the Pilbara Craton, Western Australia, the sequence is about 5 km in stratigraphic thickness and exposed over about 75 km strike length. It consists mainly of tholeiitic and minor komatiitic basalt, some felsic lava with intercalated carbonate, and chert beds. It is 3.52 Ga old and its metamorphic grade is only mid-greenschist to lower amphibolite facies. It contains sedimentary carbonate and kerogen that may represent some of the oldest traces of life on Earth.

See Also

Keywords

Bioorganic Chemistry Sedimentary Carbonate Metamorphic Grade Amphibolite Facies Strike Length 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Maison des GéosciencesLGCA, Université J. FourierSt-Martin d’HèresFrance