* Formation: Sedimentary rocks form from the accumulation and cementation of sediments, which can include the remains of organisms.

* Preservation: The process of sedimentation and burial can protect organic remains from decomposition and erosion, allowing them to fossilize.

* Types: Common sedimentary rocks that often contain fossils include:

* Limestone: Formed from the accumulation of shells and other marine organisms.

* Sandstone: Can contain fossilized tracks, footprints, and other traces of life.

* Shale: Fine-grained sedimentary rock formed from mud, which can preserve delicate fossils.

While fossils can occasionally be found in metamorphic rocks (rocks that have been transformed by heat and pressure), the process usually destroys the original organic material. Igneous rocks (formed from cooling magma or lava) are unlikely to contain fossils because the high temperatures involved would incinerate any remains.