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The sea is absolutely brimming with microscopic life, including bacteria that make their living by a constellation of different metabolic processes, and the Archaeans, among which are the extremophiles living in vents at temperatures well above the boiling point of water.

The sea was the mother of all life beginning some 3.8 billion years ago, and remains so today.

In addition, the editors particularly welcome integrated process-oriented studies that involve a combination of the above fields and comparative studies that demonstrate the effect of Precambrian evolution on Phanerozoic earth system processes.

That's a very long timetable from 4,500, 000,000 years ago right up to 542,000,000 years ago, a total of 3,958,000,000 years.

Read more publishes studies on all aspects of the early stages of the composition, structure and evolution of the Earth and its planetary neighbours.

It covers, but is not restricted to, subjects such as:(1) Chemical, biological, biochemical and cosmochemical evolution; the origin of life; the evolution of the oceans and atmosphere; the early fossil record; palaeobiology;(2) Geochronology and isotope and elemental geochemistry;(3) Precambrian mineral deposits; (4) Geophysical aspects of the early Earth and Precambrian terrains; (5) Nature and evolution of the Precambrian lithosphere and mantle including magmatic, depositional, metamorphic and tectonic processes.

That is why the traditional boundary between the distant geological past and the period of life on Earth, is defined at start of Cambrian.Proterozoic was the eon when cyanobacteria produced oxygen, iron and methane were oxidized, and life emerged in the late of the period on the bottom of the sea.Several very severe ice ages occured in Proterozoic that is the Huronian, Sturtian, Marinoan and Gaskiers ice ages. Earth's earliest geological period has been named the Hadean after the underworld in the Greek mythology, Hades.The geological eons in Precambrian - Hadean was the burning inferno right after Earth's creation.The first rocks, that we know about, were formed in Archean, water vapor condensed, and an atmosphere of nitrogen and methane was created.

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