Meteorites Delivered Gold to Earth
Source: BBC, Leila Battison (9/8/11)
"Gold was delivered by meteorites."
The Earth's crust and mantle has considerably more gold than expected from favored models of planetary formation.
A study from the University of Bristol looked at some of the oldest rocks on Earth, demonstrating that gold was delivered by meteorites.
While the Earth was forming, iron sank to the center of the planet.
A final burst of meteorite impacts around 3.9 billion years ago is known as the "terminal bombardment" and caused the cratering that we see on the Moon.
It was during this last impact event that the gold that we can access in the crust was delivered. . .View Full Article