Brachiopod fossil identification Longest dimension of specimen is approximately 4. These are visually appealing and quite engaging. I have the book and have been on those sites, they all look the same to me - lol. Fossil Identification Guide for the Devonian Silica Shale of Northern Ohio - Fossil Park. Share Oct 11, 2023 ยท Wang et al. Bivalves and brachiopods are both sessile filter feeders, sitting on the seafloor and filtering water for food and oxygen. There is a large amount of small and broken crinoid stems. Thus, the majority of Indiana fossils are marine fossils. Fossils of aquatic organisms with shells or exoskeletons such as mollusks, brachiopods, corals, crinoids, and trilobites are abundant in many sedimentary rocks. Have you found some interesting fossils but are unsure how to identify them? Are you confused about the difference between brachiopods and bivalves, or crinoids and corals? Explore a variety of fossil identification and exploration resources on this page. sjphtmpdnbbjfxfilcxtbhyfibujuyecnofddyqmcvznppmbclpmkyglfahkhlwukocvpjwfd