Could tectonic plates shift or drift on a flat plane?
I would love it if RocksEverywhere thought about this and gave his honest opinion.
You have summoned me.
Talking purely plate tectonics, with the plates moving around, driven by the creation of new oceanic crust at spreading ridge, and subduction, I see no issue with a flat earth. In fact, schematic drawings of these systems are usually done with a "flat" earth, as the curvature has no significant effect on these processes. I.e.:
One thing, however, is a slight issue and that would be the border of the flat earth. There are no recorded "fixed" points of crust and this means that plates would be able to slip off the edge. BRB writing a new Hollywood disaster movie. Should I let Australia slip off the edge? Get rid of all those nasty spiders.
Anyway, I guess in the geographical model of the flat earth, Antarctica would be assumed to be fixed anyway (its actually semi stable atm, moving only 1 cm per year toward the Atlantic Ocean) and then it would be a non issue.
PS. For the globers among us who get excited from curvature:
PPS. Today I learned there's a Shetland Plate and a Sandwich Plate (LOL)
https://en.wikipedia.org/wiki/Antarctic_Plate#/media/File:AntarcticPlate.png