Coster and Prof. Hevesy of Copenhagen, and named by them hafnium, was doubtless similar in character to the deposit observed to occur in the bed of a rivulet at Tregonwell Mill, near Menaccan ...

But cratons are home to tiny particles of zircon, which contain multiple isotope systems such as uranium, hafnium ... mantle to a period of more volatile plate movement. The new study, which ...