Evidence of 'modern' plate tectonics dating to 2.5 billion years ago found in China - Livescience.com

Rare minerals show evidence of an ancient subduction zone.

A unique rock formation in China holds clues that tectonic plates subducted, or went underneath other plates, during the Archean eon (4 billion to 2.5 billion years ago), just as they do nowadays, a … [+6111 chars]

full article...