Discovery of world's oldest rocks brew controversy

日期:2017-05-18 07:00:02 作者:公冶拊 阅读:

HAS the record for finding the world’s oldest rock really been broken? At 4.28 billion years old, the rocks suggest Earth’s continents formed much earlier than thought, but the finding has been hotly disputed. Jonathan O’Neil of McGill University in Montreal, Canada, and colleagues measured levels of neodymium-142 in rocks from the Nuvvuagittuq greenstone belt in northern Quebec to come up with the figure (Science, DOI: