Ancient Asteroid Impact May Have Created Oldest Crystals On Earth Zircon crystals, the oldest rock pieces on Earth, could have developed from ancient asteroid impact craters, a new study has found. Contrary to previous belief, the collision of tectonic plates had nothing to do with it. by Katherine Derla
Science Zircon crystal found in Australian sheep ranch is 4.4 bn years old. Yes, as old as Earth's crust by Alex Saltarin