Hanika Rizo

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Affleurement de roches vieilles d’environ 4,16 milliards d’années dans la ceinture de roches vertes de Nuvvuagittuq, dans le nord-est du Canada. (Jonathan O'Neil via AP)

Les plus vieilles roches de la Terre ont plus de quatre milliards d’années et ont été retrouvées au Québec

Hanika Rizo, Carleton University and Jonathan O’Neil, L’Université d’Ottawa/University of Ottawa

Des roches datant de la première période de l’échelle géologique ont été retrouvées au Québec. Il s’agit de certains des matériaux terrestres les plus anciens jamais datés par les scientifiques.
An outcropping of about 4.16 billion-year-old rocks at the Nuvvuagittuq Greenstone Belt in northeastern Canada. (Jonathan O'Neil via AP)

The oldest rocks on Earth are more than four billion years old

Hanika Rizo, Carleton University and Jonathan O’Neil, L’Université d’Ottawa/University of Ottawa

Rocks from the Hadean Eon, the first period in the geological timescale, have been dated in Québec. These are some of the oldest terrestrial materials dated by scientists.
Material from the Earth’s core has been leaking into the mantle through activity that led to volcanic eruptions such as that helped form the Hawaiian islands. EPA/Bruce Omori/Paradise Helicopters

Earth’s core has been leaking for billions of years

Hanika Rizo, Carleton University; David Murphy, Queensland University of Technology, and Denis Andrault, Université Clermont Auvergne (UCA)

New findings suggest the core has been leaking for the past 2.5 billion years, and that could help scientists understand how the core was formed.

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