[ahayes]

not evidence that there is some unknown condition that would preserve putrescin for 'millions of years'.

What, you mean the unknown condition of being sealed in solid rock?

[GourmetDan]

If you know anything about rock, you know it is not 'sealed'. It is quite porous.

Much too porous for putrescin to survive for 68 million years.

A few thousand years? Even that's a stretch. But millions, no.