[Moral Hazard]

"all carbon 14 should deplete by 90,000 years"

The half-life of Carbon 14 is 5,730 years. In 90,000 years it should deplete by to .0019 % of it's original amount. Why would that be the same as disappearing?

[shubi]

Carbon dating is only useful to a maximum of 50,000 years.

There are about 40 different methods of dating including K-Ar etc. These can date much older samples.

Synchronous dating is pretty foolproof and all doubts about old Earth should be discarded, if reason was involved in this issue.