The scientists of today have long used fossils as their basis of knowledge about dinosaurs. Fossilization has been thought of as a process whereby bone and organic material is slowly replaced by inorganic sedimentary minerals.
However, the fossilization process has not been wholly understood until recently. Most fossils are buried deep within the earth near water tables; the same underground water responsible for transforming bones to fossils creates other side effects in the process.
The water table raises and lowers over centuries so that fossils are periodically submerged. In periods where a fossil is covered with water it swells, as the water leaves it deposits minerals into the fossil causing it to collect more and more mass albeit very slowly . |