Considering the theory of plate tectonics and the movement of landmasses over geologic time, would ...

Many aspects of the atmospheric circulation would likely be the same under different tectonic configurations, especially the Hadley Circulation and the associated equatorial regions of high rainfall and subtropical deserts. Regional circulations would be very different under different tectonic configurations. For example, before the collision between India and Asia, there was not a strong Asian monsoon that we see today. At a more local level, the presence or absence of mountain ranges would have exerted strong influences on circulations.

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