Bruce, it is a crinoid columnal................from the stem of a crinoid. Picture it being a single coin in a stack. A "stack" of columnals would make up a stem. I circled the stem on this example which is actually from Indiana.
Chuck
Crinoids are echinoderms. A group (phylum actually) of marine organisms that include starfish, sand dollars, brittle stars, and sea cucumbers to name a few.