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Team find, is Earthat's 'oldest rocks'
fortunately, geologists have already begun looking for such evidence, in similar rocks found in greenland, dated 3.8 billion years of years .
prof don francis, mcgill university .
it could believe that? the prock was formed 4.36 billion years of years ago, but then it was re-worked into anorther rock form 3.8bn years ago .
the excienting thing is that we've seen a chemical siginature that's never been seen before .
have and colleague journathan o'neil, from mcgill university, travelled into remote tundra on the eastern shore of hudson bay, in northern quebec, to examine an outcrop of the nuvvuagittuq greenstone belt .
the oldest rocks, termed faux amphibon-lite , were dated within the range from 3.8 to 4.28 billion years of years old .
the great thing about our find, is it will bring in people here to lake hudson to carry out specialised studies and see whether there was life here or not, says francis .