stromatolite


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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 ?
These deposits were formed as microbial mats in a subtidal to intertidal environment of a shallow platform system, associated to planar-laminated stromatolites (Calvet et al.
About a billion years before the dinosaurs became extinct, stromatolites roamed the Earth until they mysteriously disappeared.
It's one thing to read a description of a stromatolite and it's another to see a beach edged with them.
The method used in the study consisted of replicating the algorithm proposed by Petrisor and Decho for the study of the orientation of cyanobacteria in marine stromatolites (Petrisor and Decho, 2006).
Recently, McNamara and Awramik (1992 [16]) have concluded, from the study of stromatolite, that at about 700 m.
Stromatolites are large features--often many meters in size--that can be formed by the lithification of laminated microbial mats, (Fig.
Two of the best known dynamic coastal bacterial communities are sebkha and stromatolite communities.
Reinterpreting a Proterozoic enigma: Conophyton - Jacutophyton stromatolite reefs of the Mesoproterozoic Atar Group, Mauritania.
The remarkable stromatolite preservation observed in different sedimentary sections allows for the recognition of macro and microfeatures, as well as the reconstruction of growth fabrics, laminae variations, the exceptional preservation of microbial communities including rod-like bacteria.
Matthew described them as Archaeozoon acadiense, the first Precambrian stromatolite properly identified in the scientific literature (Matthew 1890; Hofmann 1974; Miller 2003).
2005a, Cambro-Ordovician stromatolite occurrences in the Ottawa region: Geological Society of America, Northeastern Section, 40th Annual Meeting, Saratoga Springs, NY, paper No.