Early Archean stromatolites : Paleoenvironmental setting and controls on formation
- Lowe, D. R.
- Oct 1, 1991.
- Physical Description:
- 1 electronic document
- Restrictions on Access:
- Unclassified, Unlimited, Publicly available.
Free-to-read Unrestricted online access
- The earliest record of terrestrial life is contained in thin, silicified sedimentary layers within enormously thick, predominantly volcanic sequences in South Africa and Western Australia. This record includes bacteria-like microfossils, laminated carbonaceous structures resembling flat bacterial mats and stromatolites, and a morphologically diverse assemblage of carbonaceous particles. These structures and particles and their host sediments provide the only direct source of information on the morphology, paleoecology, and biogeochemistry of early life; the nature of interactions between organisms and surface systems on the early earth; and possible settings within which life might have evolved. The three known occurrences of 3.5 to 3.2 billion-year-old stromalites were evaluated in terms of depositional setting and biogenicity.
- Other Subject(s):
- NASA Technical Reports Server (NTRS) Collection.
- Document ID: 19920004417.
Accession ID: 92N13635.
NASA, Washington, Fourth Symposium on Chemical Evolution and the Origin and Evolution of Life; p 71.
- No Copyright.
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