Plato didn't give a time frame. He was relaying a story Egyptians gave him.<quoted text>Dave, you are simply outdoing yourself this time.
You are suggesting that about 12,000 years ago (according to Plato, whom you are referring to) the South American continent was sitting next to Africa. Do you have any idea how fast the continents are moving apart due to the Mid-Atlantic Ridge? It is much, much, much slower than the scenario you suggest. Based on geological evidence, the event you are referring to (Gondwana breaking apart) happened about 140-150 million years ago, not 12,000.
Humans were not around 140-150 million years ago, by the way. Flowers had only just evolved based on fossil evidence.
You are assuming the continental drift theory as presented is true.
Look at that area. There is no other geological formation like that I can find. It is very odd. If you can find one like that, please link.
If it was as I said about the continents being much closer, Atlantis would not be such a fable.
There are also folk tales where some Indian tribes claim to be from Atlantis originally.
Look at Google Earth. That is taken from space. Explain why the SE coast of Africa was not erased. It is a very close fit to today's coast.