I have a slab 23 cm x 13 cm of the same rock as the beads. This photo is taken vertically on the bedding plane or original depositional plane of the shells. Some single, not too crushed valves of clam are clearly recognizable. On this slab I recognized just three snails, I'll try to send another picture. However, 99% of the fossils belong to bivalves; maybe it's clear to me because I'm ain invertebrate palaeontologist, and I'm accustomed to "read" this kind of rocks just like an arab is able to read arab writing, which are quite unfamiliar to me.

Greetings, Giorio