Island and archipelago of the western Caroline Islands, part of the Federated States of Micronesia, know for large wheel-shaped discs of stone money. The stone is quarried in the Palau Islands and taken to Yap by canoe. Yap was at the head of a chain of trade and tribute in the Carolines, the so-called Yapese empire and in contact with Palau and the Marianas Islands as seen in similar red ware of the 2nd millennium BC. The occurrence of child jar-burial suggests later contact with the Philippines.