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Westall, F ; de Wit, MJ ; Dann, J ; van der Gaast, S ; de Ronde, CEJ ; Gerneke, D

Early Archean fossil bacteria and biofilms in hydrothermally-influenced sediments from the Barberton greenstone belt, South Africa

Precambrian Research 106 (1-2) 93-116

par Administrateur - publié le , mis à jour le

Abstract :

SEM imaging of HF-etched, 3.3-3.5 Ga cherts from the Onverwacht Group, South Africa reveals small spherical (1 mum diameter) and rod-shaped structures (2-3.8 mum in length) which are interpreted as probable fossil coccoid and bacillar bacteria (prokaryotes), respectively, preserved by mineral replacement. Other, possibly biogenic structures include smaller rod-shaped bacteriomorphs (