10 September 2009 Fossil microorganisms and formation of Early Precambrian weathering crusts
Author Affiliations +
Abstract
Weathering crusts are the only reliable evidences of continental conditions existence, and often are the only source of information about exogenous processes and subsequently about conditions under which the development of biosphere occurred. Complex of diverse fossil microorganisms was discovered in result of electronic-microscope investigations. Chemical composition of discovered fossils is identical to that of the host rocks and is represented by Si, Al, Fe, Ca and Mg. Probably, microorganisms fixed in rocks played role of catalyst. Decomposition of minerals, comprising rocks, and their transformation into clayey (argillaceous) minerals, occurred most likely under influence of microorganisms. And may be unique weathering crusts of Early Precambrian were formed due to interaction between specific composition of microorganism assemblage and conditions of hypergene transformations. So it is possible to speak about colonization of land by microbes already at that time and about existence of single raw from weathering crusts (Primitive soils) to real soils.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. M. Astafieva, A. Yu. Rozanov, A. B. Vrevsky, N. A. Alfimova, V. A. Matrenichev, R. B. Hoover, "Fossil microorganisms and formation of Early Precambrian weathering crusts", Proc. SPIE 7441, Instruments and Methods for Astrobiology and Planetary Missions XII, 744107 (10 September 2009); doi: 10.1117/12.824535; https://doi.org/10.1117/12.824535
PROCEEDINGS
15 PAGES


SHARE
RELATED CONTENT

Surface phenomena with organic coatings for chemical sensing
Proceedings of SPIE (February 22 2002)
Iron microbial mats in modern and phanerozoic environments
Proceedings of SPIE (August 28 2008)
How desert varnish forms?
Proceedings of SPIE (September 22 2005)
Bacterial paleontology for astrobiology
Proceedings of SPIE (February 05 2002)

Back to Top