Just know this, the Egyptian mumification process is rarely as proficient.
Mumification of the bodies in Guanajuato Mexico... should also serve as a reference point...
(quick, go and Google it... that's why I hate internet debates, people try and come off as smarter than they really are because they can go 'look up' some
sort of comeback)...
The denaturalization tendencies of DNA at temperature and pressure extremes should also not be overlooked. DNA is easily hydrolyzed by water, weak organic acids and weak organic bases... So even if mineral dirts do chemically bind these agents, the salts produced by their reactions are still corrosive to the genetic material and other "soft proteins"... so how is it they managed to stand the test of time?