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As the interior of the earth cools, presumably there will come a time when the temperature gradient is insufficient to maintain the mantle plumes and hence plate tectonics.

How long will this take and what will be the consequences for the surface of the planet in terms of continent and ocean distribution and depths. Will it also affect the recycling of gases etc into the atmosphere?


marked as duplicate by Camilo Rada, Jan Doggen, daniel.neumann, bon, Communisty Apr 10 '18 at 10:58

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • $\begingroup$ Can you point me to where you think this has already been answered. I did a search but came up blank - that is why I asked the question. $\endgroup$ – John Webb Dec 9 '18 at 19:21