Geologists found a 3.8-billion-year-old sheeted dike complex, the oldest-known chunk of Earth’s crust, in Greenland.
Geologists found a 3.8-billion-year-old sheeted dike complex, the oldest-known chunk of Earth’s crust, in Greenland.
Geologists found a 3.8-billion-year-old sheeted dike complex, the oldest-known chunk of Earth’s crust, in Greenland.