Evidence About Earth’s Past (Book)
- in Sedimentary Rock
Most fossils form when a dead organism is buried in sediment. Layers of sediment slowly build up. The sediment is buried and turns into sedimentary rock. The remains inside the rock also turn to rock. The remains are replaced by minerals. The remains literally turn to stone. Fossilization is illustrated in Figure.
Fossilization. This flowchart shows how most fossils form.