Encyclopedia of Astrobiology

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

Dixon Island Formation, Western Australia

Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27833-4_450-3

Definition

The Dixon Island Formation is a 3.2-Ga-old sequence of lightly metamorphosed but highly silicified cherts, organic-rich black shales and tuffs belonging to the Cleaverville Group and located in the Pilbara Craton, Western Australia. The unit is thought to have formed through shallow marine hydrothermal alteration of Archean oceanic crust. Possible microbial mats and bacteria-like structures have been observed and are considered by some to be traces of early life. The sequence was the target of the Dixon Island-Cleaverville Drilling Project (DXCL-DP). The most important objective of the DXCL-DP was to understand the nature of the Middle Archean marine environment, influenced by hydrothermal activity, through detailed and systematic study of fresh drill core samples.

See Also

Keywords

Systematic Study Bioorganic Chemistry Marine Environment Early Life Core Sample 
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