My "that's not quite right" detector has tingled over some of Crashfrog's postings before, but this is the first time I've responded.
I'm not even quite sure what to say, other than I feel that the Frog's sometimes operating at the fringes of his/her knowledge.
quote:
And radiometric clocks only start counting from the time the stone became stone. So the age of the lime material has no bearing on the tested age of the limestone it forms. The clock is reset.
This is a bit muddled. Limestones are not (directly) radiometricly age dated. So there is maybe some truth there - maybe call it a half-truth (quarter truth?).
quote:
Remember the radiometric dating dates the time since the hardening of the stone, not the age of the matter itself.
See above comments.
Hypotheticly, one could have a quite recent sandstone, made up of very old zircons. That is, the zircons may have originally crystalized, say, 4 billion years ago. They would age date at 4 bya. But the sandstone might only be, say, 1000 years old.
Well, another crappy posting from -
The Moose
(those who can't post quality messages, moderate those who can
)