stromatolite

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Related to Stromatolites: Cambrian Explosion

stromatolite

(strō-măt′l-īt′)
n.
A usually rounded or columnar sedimentary structure consisting of alternating layers of carbonate or silicate sediment and fossilized microbial mats, produced over geologic time by the trapping, binding, or precipitating of minerals by groups of microorganisms, primarily cyanobacteria.

stro·mat′o·lit′ic (-măt′l-ĭt′ĭk) adj.

stromatolite

a rock-like mound, often found in fossil form (which can be over 3000 million years old), created by CYANOBACTERIA. It is possible that the fossil microbes within the stromatolite were able to produce oxygen from photosynthesis. If so, they are likely to have had a profound effect on the course of evolution of living forms.
References in periodicals archive ?
In the present study, the stromatolites were sampled from the upper part of the sequence, in the socalled Unit 2 by Palma et al.
2000) resulted in recognition of the first-reported occurrences in Canada of quartz arenite containing stromatolites and biofilm structures (Fig.
Dr Abigail Allwood said the fossils, known as Stromatolites, were the oldest record of life ever found.
In the tropics, these mats, called stromatolites, become thick; cyanobacteria inside them look almost indistinguishable from those in three-billion-year-old fossil stromatolites.
PRELIMINARY FIELD RESEARCH OF STROMATOLITES IN LAGUNA BACALAR, MEXICO.
Small structures, considered to be stromatolites, similar to the laminar and small domal stromatolite Ozarkcollenia, occur in ferruginous Mesoproterozoic bedded tufts of the Cope Hollow Formation near Johnson's Shut-ins, Reynolds County, Mo.
One of the reasons for Shark Bay's World Heritage listing was the presence of structures known as stromatolites in the southern end of Hamelin Pool.
The role of microbes in accretion, lamination and early lithification of modem marine stromatolites. Nature 406: 989-992.
The lake has a depth of at the most 2.0m has a unique formation of stromatolites, both living and fossilized as well as microbial mats that are up to 1.0m thick in sections.
The newly found structures, (http://www.nature.com/news/claims-of-earth-s-oldest-fossils-tantalize-researchers-1.20506) according to researchers , are tiny bumps with their shapes and internal layering strongly resembling both ancient and modern stromatolites. In addition, the surrounding rocks also contain carbonate minerals such as dolomite that are common in younger stromatolites.