Some of the fossils represent the entire skeletons of small organisms, including the mysterious "Cloudina" and some snail-like molluscs. However, the bulk of the fossils are fragments or parts of larger organisms, including sponges, molluscs, slug-like halkieriids, brachiopods, echinoderms, and onychophoran-like organisms that may have been close to the ancestors of arthropods.