Currently they are not only buried in ice, there's another mile packed on top of them!
That is a very long time to be iced up.
The current Ice Age period in the Northern Hemisphere is a mere 2.5 to 5.0 million years in duration.
The next glacial maximum is some 5,000 years overdue.
Eventually the climate model makers will figure it all out ~ this world is normally in an ice age and there's nothing wrong with "warm".
Compared to the prior century, the 1st. 11 years of this century are seeing the horse sh-t is a lot deeper. Holt spotted owl crap Batman.