Sac spine of a large Pirasocrinid (crinoid) in the Beil Limestone, Cass County, Nebraska.The Beil here does not have a very diverse fossil assemblage, only a few brachiopods, crinoid plates and fusulinids having been found among the abundant corals.
![Outcrop of King Hill Shale and Beil Limestone Members of the Lecompton Formation, Cass County, Nebraska](/data/images/geologysoils/fossils/beil.jpg)
![Sac Spine](/csd-esic/NebrInvertFossils/CrinoidBeil/sacspine.jpg)
Sac Spine
Description: Sac spine of a large Pirasocrinid (crinoid) in the Beil Limestone, Cass County, Nebraska.The Beil here does not have a very diverse fossil assemblage, only a few brachiopods, crinoid plates and fusulinids having been found among the abundant corals.