Permineralized fossil are formed when dissolved minerals precipitate from a solution in the space occupied by the organism's remains.
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when an organism dies it's fossils will form into stones of similar substance by the process of petrification or permineralization
Petrified fossils are formed when other minerals replace all or part of an organism.
Permineralization is the process of fossilization where mainly water mineral deposits take the form of the organism. The minerals harden with time and pressure from over laying deposits turning into rock. Petrification happens when silica binds with celulose of a plant and turns into stone often retaining the microstructure of the plant.
The oldest known fossils are up to 3.5 billion years old.
well in your body there are made up of fossils as fossils are formed in hot places and your body is very warm
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Sedimentary rocks