Earth recycles 2.5-billion-year-old ocean crust

By Becky OskinLiveScienceThe remains of a real-life journey to the center of the Earth are preserved in a South Pacific volcano, a new study suggests.The lava that erupted from the Cook Islands volcano, called Mangaia, contains a few tiny grains of sulfide, a mineral, with a peculiar ratio of sulfur isotopes, according to research published in Wednesday's issue of the journal Nature. The unusual r...