The Tabon Cave complex appears to have been a kind of
Stone Age factory, with both finished
stone flake tools and waste core flakes having been found at four separate levels in the main chamber.
Charcoal left from three assemblages of cooking fires has been
carbon-14-dated to roughly 7,000, 20,000, and 22,000
BCE. The right mandible of a
Homo sapiens, dating to 29,000 BC, was discovered together with a
skullcap. It is considered to be the earliest skullcap of modern humans found in the Philippines and is thought to have belonged to a young female. The Tabon mandible is the earliest evidence of human remains showing archaic characteristics of the mandible and teeth. The Tabon
tibia fragment, a bone from the lower leg, was found during the re-excavation of the Tabon Cave complex by the
National Museum of the Philippines. It was sent to the
National Museum of Natural History in France to be studied. An accelerated carbon dating technique revealed a dating of years ago, making it the oldest human fossil recovered in the complex. The Tabon Cave complex is named after the
Tabon scrubfowl (
Megapodius cumingii), which deposited thick hard layers of
guano during periods when the cave was uninhabited, so that succeeding groups of toolmakers settled on a cement-like floor of bird dung. About half of the 3,000 recovered specimens examined were discarded cores of a material that had to have been transported from some distance; this indicates that the inhabitants were engaged in tool manufacture. The Tabon fossils are considered to have come from a third group of inhabitants, who worked the cave between 22,000 and 20,000 BCE. An earlier cave level lies so far below the level containing cooking fire assemblages that it must represent
Upper Pleistocene dates such as 45,000 or 50,000 years ago. Anthropologist
Robert Fox, who directed the excavations, deduced that the Tabon Cave complex acted as a human habitation for a period of 40,000 years, from 50,000 to 9,000 years ago. In total, around 483 human remains were found in the expeditions of 1962 and 2000. Physical anthropologists who have examined the skullcap agree that the remains belonged to modern humans,
Homo sapiens, as distinguished from the mid-Pleistocene
Homo erectus species. ==Location==