[blam]

"so thick that the exit from the Mediterranean into the Atlantic "

Ah ha! Nothing was said about the mud being in either the Mediterranean or the Atlantic, only that the waterways were impassable from the mud.. Also, I believe that Solon was told by the Egyptian high priests that this all occurred 9,000 years before their time.

[Savage Beast]

Perhaps he did say that the waterways were impassable and not specify which waterways. It's been a long time. It's interesting that the water-weathering of the Sphinx dates it to about 10,000 B.C., coinciding approximately with Plato's account. I'm still thinking...