Encrinite

Encrinite within the Carmel Formation (Middle Jurassic) exposed at Mt. Carmel Junction, Utah. This is one of the youngest encrinites.
Encrinite (crinoidal limestone) from the Mississippian Ft. Payne Formation of southern Kentucky
Example encrinite from the Silurian Brassfield Limestone of Ohio. Note different sizes of ossicles present.

Encrinites are a type of grain-supported bioclastic sedimentary rock in which all or most of the grains are crinoid ossicles. In older literature, the word is sometimes used to refer to individual fossil crinoids, but this usage is obsolete.