archaean

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Synonyms for archaean

of or relating to the earliest known rocks formed during the Precambrian Eon

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References in periodicals archive ?
A methanogenic (methane-producing) archaean called Methanothermococcus okinawensis thrived in laboratory conditions mimicking those thought to exist on Saturn's satellite, the team said.
On Earth, this type of archaean is found at very hot temperatures near deep-sea hydrothermal vents, and converts carbon dioxide and hydrogen gas into methane.
If bacterial and archaean organisms are as genetically divergent from each other as from eukaryotes (Ciccarelli et al.
After a week, the researchers found unusually large amounts of carbon-13 in the RNA of a group of microbes previously dubbed Rice Cluster I archaeans but normal amounts in other soil microbes.
Beating these caveats in mind, data currently available indicate that stromatolitic microbial ecosystems, evidently including cyanobacteria and other members of the bacterial domain, were extant [approximately]3500 Ma ago (4, 5); methanogenic archaeans by [approximately]2800 Ma ago (6, 7); and gram-negative sulfate-reducing bacteria as early as [approximately]2700 Ma ago (8) and possibly earlier (9).