Tagasi otsingusse
Friedmann & Weed, 1987

Microbial trace-fossil formation, biogenous, and abiotic weathering in the Antarctic cold desert

Friedmann, E., Weed, R.
DOI
DOI10.1126/science.11536571
Aasta1987
AjakiriScience
Köide236
Number4802
Leheküljed703-705
Tüüpartikkel ajakirjas
Keelinglise
Id8372

Abstrakt

In the Antarctic cold desert (Ross Desert), the survival of the cryptoendolithic microorganisms that colonize the near-surface layer of porous sandstone rocks depends on a precarious equilibrium of biological and geological factors. An unfavorable shift of this equilibrium results in death, and this may be followed by formation of trace fossils that preserve the characteristic iron-leaching pattern caused by microbial activity. Similar microbial trace fossil may exist in the geological record. If life ever arose on early Mars, similar processes may have occurred there and left recognizable traces

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