Right to the point that North America and Africa (and Europe and South America for that matter) were, as surely as we can judge these things, part of a large continent, some tens of millions of years ago.

However, since Margiani appears also to be proposing that the separation was "catastrophic" in a sense we might understand, he is -- to put it nicely -- a bit off the mainstream. Plate tectonics is mainstream these days, but the movement of plates is glacial, order of cm movements per year. Best we can determine there was no massive sudden wrenching apart of the continents. By the way, his context answers the next question:

I'd take that to mean the observed traces of the continental movements. These can be traced in several ways. I've not seen the word before either, but I suspect I'm not far from the intended meaning. English is wonderfully flexible in creating words to express ideas; this is not too bad an example.

No, but Word (and most other word processing programs with spell checking) can be "trained" to recognize whatever neologisms you wish it to. Since 'cosmogeology' and its linguistic variants are the subject of this thread, it's easy enough to add those words to ones local dictionary; then you won't be bothered by them again.

There are limits to what a spell/grammar checker can do, however. I suspect phrases like "unbeliever hell" will get through (although the result is somewhat amusing).