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Plate tectonics do change the terrain and create new boundaries and landscapes, both geographically and geopolitically. From the book The Vernacular Landscape:

The most basic political element in any landscape is the boundary. Politically speaking what matters first is the formation of a community of responsible citizens, a well-defined territory composed of small holdings and a number of public spaces; so the first step toward organizing space is the defining of that territory, after which we divide it for the individual members. Boundaries, therefore, unmistakable, permanent, inviolate boundaries, are essential.