Tag Archive for 'Samarium'

The Nuvvuagittuq Greenstone Belt, Canada. Image credit: Jonathan O’Neil.

Canada’s Nuvvuagittuq Greenstone Belt Harbors Fragments of Earth’s Oldest Crust, Study Shows

Jun 27, 2025 by News Staff

Geologists have discovered compelling evidence for preservation of Hadean rocks — dating back to 4.16 billion years old — in a complex geological...

An artist’s rendition of a supernova explosion. Image credit: ESA / Hubble / L. Calcada / NASA’s Goddard Space Flight Center.

Nearby Supernovae Caused Late Devonian Extinctions, Scientists Say

Aug 19, 2020 by News Staff

Multiple supernova explosions about 65 light-years away may have contributed to the ozone depletion and several subsequent extinction events at the Devonian-Carboniferous...

An artistic conception of the early Earth. Image credit: Simone Marchi / NASA.

Geologists Find Remnants of Early Earth’s Crust in Canada

Mar 17, 2017 by News Staff

An analysis of rock samples collected from the Superior Province, the region in Canada just north of the Great Lakes, suggests the samples contain components...