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 ?
The Khovanshchinian deposits are massive limestones including numerous horizons of dome-shaped stromatolites.
com/smart-news/what-happened-to-the-stromatolites-the-most-ancient-visible-lifeforms-on-earth-84714880/) Stromatolites can be thought of as topographical fossils, or even prehistoric graveyards - they are rounded mineral structures whose numerous layers are composed of the remains of some of the world's first life forms.
No emersion marks were found, but in the two last sequences stromatolite lamination can be observed at tops, pointing to shallow (subtidal to intertidal) conditions, as currently occur in Bahamas.
After seeing the amazing 'Pinnacles' rock formations in Nambung National Park and the ancient stromatolites at Lake Thetis our first stop was Geraldton, where we stayed at lovely unspoiled Tarcoola Beach.
Others--like the brown, globbish stromatolites in western Australia, or the similarly lumpy, but green llareta plant in Chile's Atacama Desert--could well be part of an artist's rendering of an alien landscape.
The episode also includes the search for stromatolites - the oldest-known form of life - and explains how these ancient fossils might help us find life on Mars.
Fluvial tufa represents barrages and mounds of mosses and stromatolites along the main course of the wadies.
It is described as deposited in a shallow-marine environment, as indicated by the presence of stromatolites (Hofmann 1974).
Mound-like deposits created by ancient photosynthetic bacteria, called stromatolites, and microfossils of bacteria have been described by scientists in detail.
About a billion years before the dinosaurs became extinct, stromatolites roamed the Earth until they mysteriously disappeared.