hadean การใช้

• The Hadean environment would have been highly hazardous to modern life.
• The Hadean atmosphere could also have hosted particulate matter with catalytic surfaces.
• My last visit, nine years ago, was like a Hadean dream.
• The Archaean was later subdivided into the Archaean and the even earlier Hadean.
• This observation implies that Hadean atmospheric oxygen levels were similar to those of today.
• Oldest to newest these are the Hadean, Archean, Proterozoic, and Phanerozoic.
• Older references generally show that Hadean Earth had a molten surface with prominent volcanos.
• The Hadean, Archean and Proterozoic eons were as a whole formerly called the Precambrian.
• If this holds true, the previous beliefs about the Hadean period are far from correct.
• The ancient cores of continents, believed to date from the Hadean, are called Cratons.
• :Actually there are indications from the Hadean era that oceans existed shortly after the planet formed.
• The Jack Hills zircon led to something of a revolution in our understanding of the Hadean eon.
• Welcome to Hades, or at least to what geologists call the Hadean interval of earth's history.
• These pieces of late Hadean and early Archean crust form the cores around which today's continents grew.
• The first major scientific impact was the discovery of Hadean ( > 4000 million year old ) zircon grains at Mt.
• Zircon dating suggested, albeit controversially, that the Hadean surface was solid, temperate, and covered by acidic oceans.
• Please see the articles on the Hadean period, Giant impact hypothesis, Cool Early Earth, and Late Heavy Bombardment.
• The Isua greenstone belt of western Greenland, one of the oldest known rocks, was formed as the Hadean interval ended.
• The genesis of life on earth, some time in the fiery last days of the Hadean, remains an unyielding problem.
• In the Hadean, the Sun s output in the extreme UV range was stronger and the Earth lacked a protective ozone layer.