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Latest Hadean Stories

eb166c5457a8af5d2504405d89344ef11
2008-11-27 09:44:55

A new picture of the early Earth is emerging, including the surprising finding that plate tectonics may have started more than 4 billion years ago — much earlier than scientists had believed, according to new research by UCLA geochemists reported Nov. 27 in the journal Nature.

cfa24e4372383220e6a57ea5917fe81f
2008-07-02 18:55:00

A recent study has shown that tiny slivers of diamond forged on an infant Earth may contain the earliest traces of life, 500 million years earlier than previously believed.

969e5d7cd5f6cb8fa862644c0e83fc201
2005-09-16 10:45:09

University of Arizona and Japanese scientists are convinced that evidence at last settles decades-long arguments about what objects bombarded the early inner solar system in a cataclysm 3.9 billion years ago.

55e600a83ed482ef21e4ecec14811226
2005-06-03 17:50:00

Research funded partly by NASA has confirmed the existence of liquid water on the Earth's surface more than 4 billion years ago. Scientists have found that the Earth had formed patterns of crust formation, erosion and sediment recycling as early as 4.35 billion years ago.

d512a7cf15669f5aae1da3b09441afb41
2005-05-06 07:27:49

Researchers at Rensselaer Polytechnic Institute and Australian National University have found new evidence that environmental conditions on early Earth, within 200 million years of solar system formation, were characterized by liquid-water oceans and continental crust similar to those of the present day. The researchers developed a new thermometer that made the discovery possible.


Latest Hadean Reference Libraries

Geologic Clock With Events And Periods
2012-10-22 14:17:38

The Archean (formerly Archaeozoic) is a geologic eon between the Hadean and Proterozoic eons. The Archean Eon begins at roughly 3.8 billion years ago (Ga) and ends at about 2.5 Ga. But unlike all other geological ages, which are based on stratigraphy, The Archean eon is defined chronometrically. The lower boundary of 3.8 Ga has also not been officially recognized by the International Commission on Stratigraphy. The name Archean is derived from the ancient Greek (Arkhe), meaning...

Volcano_q
2012-06-26 19:51:17

The Hadean is the unofficial geological period of time that lies just before the Archean time period. The Hadean began with the formation of the Earth roughly 4.5 billion years ago (Ga) and ended about 3.8 Ga; the latter date varies according to different sources. Hadean is derived from Hades, Greek for “underworld,” referring to the hellish conditions on the planet at the time. The term was coined in 1972 by geologist Preston Cloud. The period was later classified as the “Priscoan...

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Word of the Day
donative
  • A gift; a largess; a gratuity; a present; a dole.
The word 'donative' comes from a Latin word meaning 'to give'.
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