So, this is based on that Pangea theory. What do you supposed caused the breakup? I mean, most likely the Flood, but how did that work, and by what mechanisms? I've read things calling that theory into question, where the fact that South America fitting into Africa is not accurate, but due to something else that happend, but can't recall the details.
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It seems hard to deny that all the continents fit together like pieces of a jigsaw puzzle. I mean, when you get down to a fine level of detail, sometimes you see things that are just uncanny. My favorite example is the island of Cyprus, which clearly used to fit in the northeast corner of the Mediterranean sea and could plug into there like a USB plug, practically.
It's hard to say whether the splitting of the continents took place during the Flood or at creation, but I think it seems more likely it was at creation since I don't see how the Flood could have literally moved continents across the globe. But I really don't know.
There is a passage in Genesis that describes this part of creation, but it kind of sounds more like there was only one continent in creation.
And God said: Let there be a firmament made amidst the waters: and let it divide the waters from the waters. 7 And God made a firmament, and divided the waters that were under the firmament, from those that were above the firmament, and it was so. 8 And God called the firmament, Heaven; and the evening and morning were the second day. 9 God also said: Let the waters that are under the heaven, be gathered together into one place: and let the dry land appear. And it was so done. 10 And God called the dry land, Earth; and the gathering together of the waters, he called Seas. And God saw that it was good.
So it says the waters were gathered together in one place, which sounds more like one vast, continuous ocean on the earth's surface. I think it would be hard to say that the earth as it exists today has the waters of the oceans all gathered together into one place. So maybe that's evidence that the continents were split in the Flood. I don't know.