A study of the Nuvvuagittuq Greenstone Belt found that its rocks go back to the Hadean Eon, making them the ideal candidate for the oldest rock.

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,

Rocks older than 4.03 billion years could shed light on Earth's earliest geological history, but they're incredibly rare.