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Archaean |
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ArchaeanWidely used term for the earliest era of geological time; the first part of the Precambrian Eon, spanning the interval from the formation of Earth to about 2,500 million years ago. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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by a number of Archean greenstone belts in the Hearne sub-province of the Churchill Structural Province which are favorable for high grade gold and nickel deposits. The Archean begins with the formation of the Earth's crust 4 billion years ago and extends to 2. Most of the largest formations date from the late Archean eon, which ended around 2. |
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