Hadean aeon


Also found in: Thesaurus, Wikipedia.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Hadean aeon - the earliest eon in the history of the Earth from the first accretion of planetary material (around 4,600 million years ago) until the date of the oldest known rocks (about 3,800 million years ago); no evidence of life
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
"The only known evolved rocks from the Hadean aeon are those in northwest Canada, which have chemical compositions clearly distinct from those that dominate ancient continental crust worldwide, suggesting they were formed in a different way," research co-author professor Phil Bland said.
"Consequently, there are almost no rocks preserved from Earth's formative Hadean aeon," Bland said.
Among specific topics are primordial massive supernovae as molecular factories at high redshifts, observational evidence for dust growth in proto-planetary discs, hydrous-carbonaceous meteoroids in the Hadean Aeon, dust in clusters of galaxies, probing dust with gamma-ray bursts, analogs of cosmic dust, intersteller ices, and interstellar dust models and evolutionary implications.