Dinosaur Fossil Petrification Process

The hard parts of dinosaur bones and teeth are made of minerals. Minerals tend to break down and recrystallize underground, becoming harder, a process known as "petrification." As the sediment above continued to thicken, the remains were buried deeper and deeper, eventually turning into fossils. And the surrounding sediments turned into hard rock. This process is extremely slow.
There are many dangers in the process of fossilization returning to the surface. During the fossilization process over thousands of years, the surrounding rock may have buckled and deformed so that the fossil was crushed. In addition, the high temperature at the bottom of the earth's crust may also melt the fossils. After escaping these disasters, someone still has to find the fossil before it separates from the surrounding rock formations, otherwise the fossil will fragment and disappear.