See Photo report
© Cyril FRESILLON/CBM/CNRS Images
Chert hydrothermal découvert à Josefdal, en Afrique du Sud et datant de 3 300 millions d'années
Max. size41.72 x 27.77 cm / 300 dpi
Add to my wishlist
The use of media visible on the CNRS Images Platform can be granted on request. Any reproduction or representation is forbidden without prior authorization from CNRS Images (except for resources under Creative Commons license).
No modification of an image may be made without the prior consent of CNRS Images.
No use of an image for advertising purposes or distribution to a third party may be made without the prior agreement of CNRS Images.
For more information, please consult our general conditions
Hydrothermal chert discovered at Josefdal, South Africa. This 16-cm rock, similar to a rock of Martian origin, dates back 3300 million years. It belongs to ISAR (International Space Analogue Rockstore), a unique collection of rocks similar to those found on Mars, kept at the Molecular Biophysics Centre (CBM) in Orleans. Comprising some fifty rocks, ISAR is used to test and calibrate certain space probe instruments, particularly for the study of traces of life on Mars. The collection contains volcanic and sedimentary rocks prepared in several forms: complete rocks, thin slices or rock powders.