* THE ARCHAEOLOGICAL SITE OF BÃI ÔNG – CHÀM ISLAND:
The site is located on Bãi Ông – Lao Island in the Chàm Island cluster, 15km from mainland and about 19km East-Northeast from Hội An ancient town.
When the site was discovered in May 1999, a trench of 4m 2 was excavated and expanded into a 16m 2 area in June 2000. On the ground surface, there were many artifacts dating back to the 17 th -18 th century. A 120cm deep cultural layer was divided into two parts:
– The 1 st cultural layer: 00-40cm in depth, with ceramics dating back to the 8 th – 10 th century.
– The 2 nd cultural layer: 50-120cm in depth, with a dense distribution of ceramics clusters and a lot of pebbles interspersed between them; polishedstone tools (shoulder axe, four – angle axe, axe blade, etc), pebble tools (anvils stone, pestle, smashed, crushed, pottery tool, etc) and boned needles, fish bones, fish teeth, seeds, coals, etc. The ceramics made from raw materials, a lot of sand and small stones were fragile. They were allfragments of pots and pottery fruit trays (with high or low bases). The ceramics body was decorated with patterns of ropes (rough, smooth) and many patterns of wolf’s teeth and triangles interleaved between S-shaped letters were drawn on the jar brims. According to radiocarbon dating, this site dated back to 3100 ± 60BP.
There is a 40-50cm deep Infertility layer between two cultural layers with bright yellow sand and iron oxides in some places.