[WIP] Building a world from tectonics onward

[Tiluchi]

This all looks excellent! If I had one small critique, it's that the subductive margin on the southern Tillerson Plate looks quite irregular, in a way that's difficult to find on Earth. With irregular plate boundaries like that I'd expect to see more offshore volcanic arcs and back-arc basins, as is the case with the western edge of the Pacific Plate or the Mediterranean Sea between the Eurasian and African Plates.

The subductive margin wrapping tightly around 3/4 of the Comey Plate also makes me a bit uncomfortable, and my sense is that the slab pull from all that subduction would make the continent rift apart in the middle. But I'm far from an expert and it looks like you've put quite a bit of work into GPlates so I'd believe you if you said it's plausible with the tectonic history and all

[MrBragg]

Hey Tiluchi, your previous tectonics projects were a big inspiration for me, so I'm glad you're here so I can say thanks!

Totally valid critiques, too. The subductive margin on the southern margin of Tillerson is quite irregular--it's also quite an oblique margin--so I think you're entirely right about this being a good place for some nice back-arc basins. Adding these in is now on the to-do list.

But I'm far from an expert and it looks like you've put quite a bit of work into GPlates so I'd believe you if you said it's plausible with the tectonic history and all

Believing me is likely a mistake My thought with Comey was that this scenario of being almost surrounded by subduction would be similar to Laurasia before the breakup of Pangea, where the reconstructions I've seen have subduction on most of its sides. Obviously it did eventually break up, but the reconstructions have the encircling subduction persisting for quite a while. The current Sunda plate is also bounded on 3 sides by subduction, so I thought such an arrangement could be stable for at least a little while. You have a lot more experience here than I do, so I'm very much open to being convinced otherwise.