Artefacts dating to the Ha Long culture (c. 4000 years BP) are uncovered in a current excavation underway at a cave site in northeastern Vietnam.
Quang Ninh: More vestige of prehistoric man discovered
VietNamNetBridge, 19 March 2008
The Ha Long culture apparently developed within the region, and is one of the early identifiable forms of material culture in Vietnam.
Archaeologists excavated tombs in Dong Trong Cave and found many pots, jars, human and animal bones. They also collected many grindstones and some pieces of pottery at the cave door. These are remains of the Ha Long culture and the cave was the home of prehistoric Ha Long men.
– Historical Dictionary of Ancient Southeast Asia by J. N. Miksic
– The Archaeology of Mainland Southeast Asia: From 10,000 B.C. to the Fall of Angkor by C. Higham
– Early Cultures of Mainland Southeast Asia