Originally Posted by
Karro
I think what EDG is trying to say is that not only the land masses but also those portions of the world that are below land are parts of tectonic plates, whether continental or oceanic, and that these plates all interact with each other. Further, tectonic plates are continuous around the globe.
The way you currently have this divided up, if we assume that this one land mass represents the sole super-continent on the planet, then there are a large number of smaller continental plates that make up this land mass, and then one ginormous oceanic plate that makes up the rest of the (submerged) surface of the world, and which completely encompasses the smaller plates.
If this is the case, the tectonics will make for a world very different from earth, at least in the short term. I'm honestly not really sure how the plates would move when these smaller plates crash against the super-plate. At any rate, your next step, if you decide that this is in fact the way of this world, would be to determine the relative movements of each of the plates. In my own world-building, I worked with the assumption that tectonic plates follow something similar to a coriolis pattern (albeit flowing on currents of subterranean magma), but a massive super-plate is likely to disrupt that pattern considerably. (Also, I'm not sure that it would necessarily be true that plates would follow a coriolis pattern, but at least it made sense to me, and gave me some logic for how and why my plates were moving in the directions they were moving.)