The oldest rocks on Earth have been discovered.

The newly discovered rocks in the Nuvvuagittuq Blue Belt are up to 4.16 billion years old. Photo: Jonathan O'Nei .

Scientists at the University of Ottawa have just announced a groundbreaking discovery in geology. They found that the rocks of the Nuvvuagittuq Blue Ring, located on the shores of Hudson Bay in Quebec, Canada, may be the oldest known rocks on Earth. The new research suggests these rocks are up to 4.16 billion years old, nearly as old as the Earth itself.

The Nuvvuagittuq Belt has long been known for containing many types of ancient rocks. However, their exact age remains a subject of debate among researchers. In 2008, some studies using samarium-neodymium isotopes suggested that the rocks there could be up to 4.3 billion years old. However, this conclusion faced opposition due to concerns that the rock samples had been contaminated, potentially driving the age higher than the actual age.

In a new study published in Science on June 26th, a team of scientists led by Professor Jonathan O'Neil used two independent dating techniques to analyze a sample of magma rock. Both methods yielded consistent results of 4.16 billion years. This strengthens the hypothesis that this is indeed one of the earliest surviving parts of the Earth's crust.

"Obtaining intact specimens from the early Earth period is truly invaluable. They help us understand more about how Earth evolved from a molten planet into a place capable of supporting life," said Professor Mark Reagan, a volcanic rock expert at the University of Iowa.

Nuvvuagittuq may hold the record for the oldest rocky object on the planet. Photo: Jonathan O'Neil/ .

With an age far exceeding that of other famous rock samples such as the Acasta Gneiss (approximately 4 billion years old) or the zircon crystal in Australia (4.4 billion years old but not intact), Nuvvuagittuq has the potential to set a new record for the oldest rock object on the planet.

However, this scientific discovery also poses a challenge for conservation efforts. The study area is located on land belonging to the Inuit community in Inukjuak. In the past, some of the rocks have been moved from their original location, causing concern among local residents.

"We understand the researchers' interest in this area, but we don't want any more damage," said Tommy Palliser, land manager at Pituvik Landholding Corporation. The Inuit community is pushing for the establishment of a provincial park to both protect the area and facilitate legitimate, sustainable research.

The discovery of the Nuvvuagittuq rock not only helps redefine Earth's geological history but also opens the door to exploring the conditions under which life formed on our planet.