Every geography schoolbook has them: maps that look like today's Earth, but not quite, since all continents are merged into a single supercontinent. Those maps were used to explain why dinosaurs in South America and Africa, or North America and Europ
And subtle differences in the timing or location of such corridors may support or falsify what we think caused past changes in climate.
But there are relics of this subducted crust left in the geological record, and in my field of research, we try to use these records to learn about Earth's 'lost' surface. Geologists can then piece together how those continents and deep basins and volcanoes linked together in the distant past.In recent years, when I explained how we make reconstructions of paleogeography from modern mountain ranges, I was sometimes asked if we could also predict future mountains. I always said,"Sure, but why would I? I'd have to wait a hundred million years to see if I'm right.
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