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Reference
20170033_0033
Roches métamorphiques découvertes au Groenland et datant de 3 800 millions d'années
Metamorphic rocks discovered in the Isua formation, in Greenland. They measure 20 cm and date back 3800 million years. They belong to the Molecular Biophysics Centre (CBM) rock collection, a unique collection of terrestrial rocks and minerals, some dating back several billion years.
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