08-25-2010, 06:22 PM
GuyGene wrote: Maybe the earth has been making crude oil since its creation.
Nope.
Crude oil comes from once-living things. Mostly from algae that collected on ancient seabeds no more than 360 million years ago.
It's doubtful that any significant amount of oil predates 500 million years. Even 400 million is probably a stretch.