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Stromatolites in Precambrian Carbonates: Evolutionary Mileposts or Environmental Dipsticks?

Grotzinger, John P. and Knoll, Andrew H. (1999) Stromatolites in Precambrian Carbonates: Evolutionary Mileposts or Environmental Dipsticks? Annual Review of Earth and Planetary Sciences, 27 . pp. 313-358. ISSN 0084-6597. doi:10.1146/

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Stromatolites are attached, lithified sedimentary growth structures, accretionary away from a point or limited surface of initiation. Though the accretion process is commonly regarded to result from the sediment trapping or precipitation-inducing activities of microbial mats, little evidence of this process is preserved in most Precambrian stromatolites. The successful study and interpretation of stromatolites requires a process-based approach, oriented toward deconvolving the replacement textures of ancient stromatolites. The effects of diagenetic recrystallization first must be accounted for, followed by analysis of lamination textures and deduction of possible accretion mechanisms. Accretion hypotheses can be tested using numerical simulations based on modern stromatolite growth processes. Application of this approach has shown that stromatolites were originally formed largely through in situ precipitation of laminae during Archean and older Proterozoic times, but that younger Proterozoic stromatolites grew largely through the accretion of carbonate sediments, most likely through the physical process of microbial trapping and binding. This trend most likely reflects long-term evolution of the earth’s environment rather than microbial communities.

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URLURL TypeDescription DOIArticle
Grotzinger, John P.0000-0001-9324-1257
Knoll, Andrew H.0000-0003-1308-8585
Additional Information:© 1999 by Annual Reviews. We are indebted to Kelvin Chan, Mike Pope, Dan Rothman, Misha Semikhatov, and Malcolm Walter for many helpful discussions and access to unpublished data. This research was supported by NASA Grant NAG5-6722 to JPG and by NASA Grant NAGW-783 to AHK. This paper is a contribution to the NASA Astrobiology program.
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Subject Keywords:Archean, fossil, limestone, microbe, Proterozoic
Record Number:CaltechAUTHORS:20130219-091750998
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36974
Deposited By: Tony Diaz
Deposited On:19 Feb 2013 23:48
Last Modified:09 Nov 2021 23:26

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