A pelite or metapelite is a metamorphosed fine-grained sedimentary rock, i.e. mudstone or siltstone. The term was earlier used by geologists to describe a clay-rich, fine-grained clastic sediment or sedimentary rock, i.e. mud or a mudstone, the metamorphosed version of which would technically have been a metapelite.

What is a pelitic rock in geology?

A pelite (Greek: pelos, "clay") or metapelite is a metamorphosed fine-grained sedimentary rock, i.e. mudstone or siltstone.

What are the meanings of pelitic?

(pē′līt′) Sedimentary rock composed of fine fragments, as of clay or mud. [Greek pēlos, clay + -ite.]