All Heck is breaking loose. Turns out , according to a recent Paper/ announcement, which, for the most part, aren't worth the pixels they're printed on, that Tectonic Theory can only (Hah,) explain the last 3 billion Years. Before that, it's a crap shoot.
Not so good for the Pangea Theorists, to whom, Earth being the same size now over the whole 4.5 Billion Years then, doesn't make sense. Tectonics should have kicked in 4 Billion Years ago.
My opinion? I think the researchers are giving and stretching the time and Giving Geologists far too much credit with that 3 By's.
Google Tectonics only 3 billion years old