Nation IN BRIEF : WASHINGTON, D.C. : Earth’s Oldest Pieces Found in Labrador
From Times Staff and Wire Reports
Geologists reported they have discovered the oldest known pieces of Earth’s mantle, rocks found along Canada’s remote Labrador coast that are between 3.8 billion and 4.2 billion years old. Until the discovery, the most ancient samples of Earth’s mantle came from South Africa and dated back about 3.55 billion years. In a study published in the journal Nature, scientists said the Labrador rocks may provide vital clues to the planet’s chemical evolution.
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