While visiting my sister in Cincinnati, I dropped off some trilobites to finish prepping in Covington, Ky. With a bit of free time on my hands, I took advantage of a road cut close by exposing the Kope Formation/ Ordovician. Many of these circular structures with a depressed center existed in the matrix I examined there. They are 1 to 1.5 cm in diameter. After running through the Dry Dredgers picture atlas, I could not find anything that resembled these. Bryozoan??? If so, they are distinctive enough to hopefully assign a genus and species to. Thanks for any thoughts!
Mike