The land-based animals each carry with them a miniature ocean, pulsing in their cells and circulatory systems.All life, including human, could be viewed as bags sea water containing the same mineral constituency as the ocean together with a dynamic dispersion of molecules that perform the biological processes that constitute life.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.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.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.

Any consideration of the geological history of earth as it pertains to the genesis and evolution of life, that is, to paleobiology, must hold the sea as centric.After that the modern high-oxygen atmosphere developed.The Precambrian (or Pre-Cambrian, sometimes abbreviated pЄ, or Cryptozoic) is the earliest part of Earth's history, set before the current Phanerozoic Eon.stromatolites) are of limited biostratigraphic use. It is thought that the Earth coalesced from material in orbit around the Sun at roughly 4,543 Ma, and may have been struck by a very large (Mars-sized) planetesimal shortly after it formed, splitting off material that formed the Moon (see Giant impact hypothesis).A stable crust was apparently in place by 4,433 Ma, since zircon crystals from Western Australia have been dated at 4,404 ± 8 Ma.Life began in the sea, and most extant life yet exists in the sea.The sea contains an incomprehensible diversity of life, mostly still undiscovered or described, ranging across all the domains of life.