I have realised something further while learning more on plate tectonics.
If the earth is made of several chunks, then why don't these chunks drift apart.
In this instance, my example will be the humble soggy biscuit (coffee or milkshake being the magma of choice).
As time goes on, and as the sogginess of the biscuit breaks apart it's chunks, you get bending and breaking off. Shaking can make this much worse.
A disaster, I know, but I've still got to move this metaphor up to the earth-size.
As time goes on, and as the magma pulls apart/smashes togethor (assuming shaking) the plates of the earth, we should see chunks breaking off. If the earth works like a biscuit, then the edges are most at peril.
I realised I didn't quite address my point in the earlier post.
I would like to discuss a replacement to plate tectonics for flat earth theory.
It will still need to cover:
Earthquakes
Volcanoes
Movement of continents (maybe)
Mountains getting taller (maybe)
All the bumps.
I reckon we have enough clever folks to come up with an alternative.
My first thoughts are of possible vibration/instability/fluctuations from UA, but that gets a bit worrying.