Archeologists have discovered more than 400 relics dating back more than four thousand years as well as a tomb marked with rocks in a cave in the northern province of Tuyen Quang.
A Wednesday report by the Nguoi Lao Dong newspaper quoted Ly Manh Thang, deputy director of the Tuyen Quang Museum, as saying the tomb was marked with 14 pieces of rock arranged in a line of more than 1.6 meters long.
Human bones were found with several stone items but no skull was seen.
Thang said other relics at the Nguom Hau Cave, part of a limestone mountain range in Na Hang District, indicate the development of two consecutive civilizations.
The earlier one, between 4,000 and 4,200 years ago, was evidenced by many labor tools made simply by grinding stones, typical tool of the New Stone Age.
Vestiges of another civilization, between 3,000 and 3,500 years old, included more sophisticated items including three axes, an item that looks like a blade of a hoe, and dozens of pottery pieces with simple decorations, he said
Thang said such a hoe blade has never been found in Vietnam and it has been sent to Hanoi for further studies.
Experts from the museum and the Vietnam Institute of Archeology found the items during excavations between September 11 and 15.
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