Bacteria forge a new link
Article Abstract:
The involvement of microorganisms in supposedly abiotic process is becoming more evident as new discoveries are established. Friedrich Widdel and his colleagues, for instance, suggested that the deposition of iron in the seas of the Archaean and Proterozoic eras were biologically influenced. This was proven by an anoxygenic and photosynthetic bacteria recently discovered by Widdel and associates. This bacteria use ferrous iron as electron donor. Aside from showing that iron deposition in primeval seas were biological processes, the new bacteria sets a new category for bacterial metabolism.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1993
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The transition to a sulphidic ocean ~1.84 billion years ago
Article Abstract:
Sediments from the ~1.8-Gyr-old animikie group, Canada, which were deposited during the final stages of the main global period of banded iron formations (BIF) deposition is investigated. The investigation allows to evaluate the two competing hypotheses for the termination of BIF deposition.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2004
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