Final answer:
Shale is an example of a clastic sedimentary rock, which consists of fine-grained particles derived from the compaction of rock fragments over a geological time.
Step-by-step explanation:
The rock that is an example of a clastic sedimentary rock is shale. Clastic sedimentary rocks are formed from the accumulation of fragments from other rocks, typically through the processes of weathering and erosion, then compaction and cementation.
Shale is particularly notable as it is made up of fine-grained particles that have been compacted over geologic time, making it a classic representative of clastic sedimentary rocks. Unlike shale, rocks such as limestone (usually non-clastic unless specifying a type like clastic limestone), iron ore, and rock salt are not classified as clastic because they are derived from chemical precipitates or biological processes rather than from the accumulation of rock fragments.