Top impression: T. gibbosula and C. rustica shells located in layer 4c in the cave in Morocco, which were being beads from precisely what is now referred to as the oldest jewelry in the world. Resource: A. Bouzouggar, INSAP, Morocco / In summary, archaeological thought about the Middle Archaic period https://bookmarkspring.com/story13262372/new-step-by-step-map-for-glass-bead-techniques