Gray rocks uncovered in northern Nunavik, Quebec, Canada may be the ultimate primordial find. The stones date back 4.16 billion years to the Hadean era and are the oldest known rocks on the planet. They are described in a study published June 26 in the journal Science .

An obscure rock formation on the eastern shore of Canada's Hudson Bay may contain the oldest known rocks on Earth, a new study claims.The analysis dated the site's streaky gray rocks, part of an outcrop called the Nuvvuagittuq Greenstone Belt,

Scientists have identified what could be the oldest rocks on Earth from a rock formation in Canada. The Nuvvuagittuq Greenstone Belt has long been known for its ancient rocks — plains of streaked gray stone on the eastern shore of Hudson Bay in Quebec.