Earths Oldest Rocks
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Principal investigator of the mission, Dr David A Kring, admitted that these findings will prove controversial, as being the first find of its kind means it will be put under more scrutiny in order to locate similar samples. These, he believes, will eventually be found.
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Related: space exploration , research , Chemistry , Astronomy. Colm Gorey is a journalist with Siliconrepublic.
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Meteorites May Have Created Some of Earth’s Oldest Rocks
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They are 4. Earth formed about 4. Remnants of crust from Earth's infancy are hard to come by because most of that material has been recycled into Earth's interior several times by the plate tectonics that continue to shape our planet's surface.
Scientists stunned to find Earth’s oldest rock in strangest of places
In , geologists found an expanse of bedrock, known as the Nuvvuagittuq greenstone belt, exposed on the eastern shore of Hudson Bay in northern Quebec. Suspecting that the rocks there could be from one of the earliest periods of Earth's history, geologists took samples to try and determine their age.
They measured tiny variations in the isotopes or species of an element that have different numbers of neutrons of the rare earth elements neodymium and samarium in the rocks and determined that the samples were from 3. The oldest dates, which came from rocks that geologists call "faux amphibolite," are thought to be ancient volcanic deposits.