this post was submitted on 18 Jul 2025
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I thought the pacific was getting smaller and the Atlantic was getting larger? I would expect the America’s to meet with east Asia.
This scenario is one possible projection; it assumes the eventual development of a subduction zone in the West Atlantic that would overcome the spreading at the mid Atlantic ridge, eventually sealing the basin. I don't understand the mechanisms well enough to know how that prediction was made, so someone with more experience on the subject can chime in.
I'm, unfortunately, likely in the same boat, as far as expertise is concerned. I have a degree in geochemistry, and I agree with your analysis of the assumptions made to produce this model, but all of the projections I've seen until this one suggested the closing of the pacific basin.
Consider that much of the pacific mid-ocean ridge (the only thing preventing the closure of the pacific basin) is already being actively subducted under the eastern pacific boundary. Think about that: the spreading boundary itself is being subducted. This makes one wonder how it would be conceivable that the pacific basin widens I'm the future, despite the vast majority of the world's active subduction boundaries being along the pacific rim.
Im gonna guess, from your response, you have the most experience on the subject of anyone we will find in this thread.
Okay. Glad I’m not the only one and I can’t believe I had to scroll so far.
From what the wikipedia page tells, under this hypothesis atlantic will stop widening in about 125 millions years, and begin to shrink.