Pingie: HTTP:: 2 Billion Year Old 039 Window 039 to Planet 039 s Past Found

HTTP:: 2 Billion Year Old 039 Window 039 to Planet 039 s Past Found
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Banded iron formations (BIF) is the name geologists gave to strikingly banded rock formations that existed around the world and that had been formed between 3.8 and 1.7 billion years ago. Their external appearance and inner composition hint at the history of the planet's climate as it was about two billion years ago, giving experts access to a wealth of knowledge about temperature shifts that could help in predicting how the current global warming trend will go on, e! Science News reports. The BIF are ever more important for studies when considering the fact that they formed on what billions of years ago was the bottom of the ocean. Iron-rich minerals like hematite and magnetite alternate in these layers with layers of silica-rich chert, offering a clear view into the nature of the waters, as they were when only a few basic forms of life existed on Earth. “They are all connected. The lithosphere affects the hydrosphere, the hydrosphere affects the atmosphere, and all !
those eventually affect the biosphere on the early Earth,” University of Wisconsin-Madison (UWM) Geology Professor Huifang Xu says. He reveals that how the rocks themselves formed all these years ago has been a subject of international debate ever since the deposits started being mined as a rich iro...
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http://news.softpedia.com/news/2-Billion-Year-Old-039-Window-039-to-Planet-039-s-Past-Found-123994.shtml
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