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> Prior to ~2 billion years ago, Earth didn't have plate tectonics. You had large vertical motion, and creation+destruction of crust, but no organized centers w
by reubenswartz 8y ago
> Prior to ~2 billion years ago, Earth didn't have plate tectonics. You had large vertical motion, and creation+destruction of crust, but no organized centers where this was occurring. In other words, you didn't have plates.
Well that would be great evidence that you don't need plate tectonics to sustain life. ;-)
- jofer 8y agoYeah, the exact start of plate tectonics on Earth is very hard to pin down, but it's almost definitely after the start of life. On the other hand, even when Earth didn't have plate tectonics, it probably never had a stagnant lid, which is what this article is modeling.