Fossils are not really bones. The living tissues of the bone are replaced with minerals from the ground in which they were buried. This takes quite some time.
Well, first the animal dies. If conditions are right (if they were to fall into a swamp or if they were buried through a flood) they would be in the ground, etc. Their flesh would decompose and nothing but bones would be present. Over a few centuries or so the bones would begin to fossilize into rock. The next thousand years or so, they would be completely fossilized into rock. It may not take that many years to fossilize. There were tests done and a complete chicken can be fossilized over a period of ten years. A dinosaur bone is bigger and it would take maybe two to four thousand years for that to happen. Well, hope this helped.
Comments
Fossils are not really bones. The living tissues of the bone are replaced with minerals from the ground in which they were buried. This takes quite some time.
EARTH/SPACE TEACHER
Well, first the animal dies. If conditions are right (if they were to fall into a swamp or if they were buried through a flood) they would be in the ground, etc. Their flesh would decompose and nothing but bones would be present. Over a few centuries or so the bones would begin to fossilize into rock. The next thousand years or so, they would be completely fossilized into rock. It may not take that many years to fossilize. There were tests done and a complete chicken can be fossilized over a period of ten years. A dinosaur bone is bigger and it would take maybe two to four thousand years for that to happen. Well, hope this helped.