"How long does it take to form veins of gold in the rock? (a) millions of years; (b) less than a second.
If you guessed (b), you overestimated. It might just be a few tenths of a second. So reported Richard A. Lovett in Nature News about a new study in Nature Geoscience on the relationship between heat, pressure, precipitation, and earthquakes."
Image credit: http://commons.wikimedia.org/wiki/File:Gold-rl-1324a.jpg