archaea

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archaea:

see ArchaebacteriaArchaebacteria
, diverse group of bacteria (prokaryotes), sometimes called the archaea and considered a major group unto themselves. Archaebacteria are contrasted with the Eubacteria, from which they differ biochemically in the arrangement of the bases in their ribosomal RNA and
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References in periodicals archive ?
On the whole, this analysis shows that the geodynamic history of the Kola Superdeep Borehole Archaean section reflects frequent changes in the formation stages of rock that differ in their geological nature.
To realize the experiments three samples of the SD-3 core from the top of the Archaean part of the section (6849-8411 m) were collected.
The basement horsts consist of the Archaean Xingu Complex which is mainly composed of gneisses and migmatites with intercalated amphibolites and mica schists.
These rock types host the majority of Archaean lode gold deposits in Australia, Canada, Zimbabwe and neighbouring Tanzania.
Although volcanic affinities of the Birrimian, together with post-orogenic granitic intrusions, were recognized, it was not before the early '70s that the Birrimian belts were compared to the Archaean green-stone belts .
The deposit is located within the Archaean Norseman-Wiluna greenstone belt.
The Lunguya property is located within one of the principal Archaean greenstone belts of Tanzania, 15-30 kilometres south of Barrick Gold's Bulyanhulu gold mine.
Zimbabwe has large areas of well-prospected Archaean gold environments.
The DM occurs on the extreme western border of the Archaean age (2,800-3,000M yr-old) Brazilian Shield.
This work, which produced a geological map at a scale of 1:100,000 identified highly favourable Archaean terrain with abundant bodies of BIF (banded iron formation) within highly metamorphosed gneiss.
The deposit is contained within a major regional shear zone in the West African Archaean Greenstone belt.
In 1992 the search for metals in the Archaean and reworked Archaean basement of West and Southwest Greenland continues as well as in the early Proterozoic Karrat group in Northwest Greenland.