The axes were found among layers of soil and rock eroded by floodwaters inside En Cave, located in the core zone of the national park.
Preliminary assessments by museum experts suggest the tools date to the Neolithic period.
Made from siliceous stone, the artefacts include shouldered and transverse-shouldered axes, with polished blades, chipping marks and wear indicating repeated use in prehistoric daily life.
En Cave serves as the gateway to Son Doong, the world’s largest known cave. It stretches more than 1.6 kilometers and has an estimated volume of 6.7 million cubic meters.
Howard Limbert is a highly respected caver with over 50 years of caving experience. He is a member of the British Caving Association and leader of the British Vietnam Caving Expedition Team, which has been exploring the caves of Vietnam for over 33 years.
