The Man from Earth2007

John Oldman:
I suspect I saw the British Isles from what is now the French coast. Huge mountains on the other side of an enormous deep valley that was shadowed by the setting sun. This was before they were separated from the continent by the rising seas as the glacier was melting.

Harry:
That happened?

Dan:
Yes, the end of the Plasticine Period. So far what he says fits.

Art:
[incredulous] Oh get... from any textbook...

John Oldman:
And that's where I found it. How can I have knowledgeable recall if I didn't have knowledge? It's all retrospective. All I can do is integrate my recollections with modern findings.