Sentences with phrase «fragment of zircon»
Not exact matches
But its beach sands contained not just fragments of eroded lava but also zircons, a mineral associated with continental crust.
http://www.sciencemag.org/
The oldest fragment of Earth's primeval crust is a zircon dated to be 4.4 billion years old, having formed less than 160 million years after planetary formation (more).