[drjimmy]

No I do not claim that dating is done just by measuring their thickness. Just like dating based on cores, you have to assume, and many assumtions are incorrect.
Now that you have acknowledged that the thickness of the ice isn't the measure of its age, since the Lost Squadron wasn't found under the ice sampled by the scientists as you claimed, your entire premise is blown away.

[jps098]

Not at all. You assume when I answer one part of your question, I answered the second. One does automatically exclude the other. You assume the way something is measured, means it was not done at all?

What's next, "When did I stop beating my wife?"