-
Archaean may
refer to:
Archaean or Archean, a
geologic eon
between Hadean and
Proterozoic Something related to Archaea, a
domain of single-celled microorganisms...
- The
Archean Eon (IPA: /ɑːrˈkiːən/ ar-KEE-ən, also
spelled Archaean or
Archæan), in
older sources sometimes called the Archaeozoic, is the
second of the...
-
designations have
practical meaning.
Current knowledge on
genetic diversity in
archaeans is fragmentary, so the
total number of
species cannot be
estimated with...
-
theory is they were
created by
symbiogenesis between an
anaerobic Asgard archaean and an
aerobic proteobacterium,
which formed the mitochondria. A second...
-
There has been some
debate as to when and even if
Vaalbara existed. An
Archaean–Palaeoproterozoic (2.8–2.1 Ga) link
between South Africa and
Western Australia...
-
volcanic sequences with ****ociated
sedimentary rocks that
occur within Archaean and
Proterozoic cratons between granite and
gneiss bodies. The name comes...
- of the Earth's history. The
Pilbara Craton is one of only two
pristine Archaean 3.6–2.7 Ga (billion
years ago)
crusts identified on the Earth.
Having been...
- Plate. Australia's
geology can be
divided into
several main sections: the
Archaean cratonic shields,
Proterozoic fold
belts and
sedimentary basins, Phanerozoic...
- more
recent works geologists often refer to both Ur and
other proposed Archaean continental ****emblages as supercratons. Ur can, nevertheless, be half...
- A
shield is a
large area of
exposed Precambrian crystalline igneous and high-grade
metamorphic rocks that form
tectonically stable areas.
These rocks are...
