Australian geoheritage reserve will save ancient zircons from abuse.
An outcrop of rock in Western Australia holding the planet's oldest discovered minerals is set to be declared a geoheritage reserve, saving it from any future mining activity.The Jack Hills reserve, which won approval from the regional government last month, will encompass a few tens of square kilometres, including a small outcrop of just a few metres holding 4-billion-year-old crystal grains called zircons.
