Abstract:
This research aims to dating Sating-Pra peninsula from fossils and sediments by thermoluminescence and radiocarbon techniques.
The study indicated that the average rate of accumulation of sediments by thermoluminescence technique during the time 3,548 ± 149 years to 1,761 ± 72 years and 3,110 ± 256 years to 1,672 ± 67 years were 1.780 mm. per year and 1.664 mm. per year, respectively. The average rate of accumulation of sediment by radiocarbon technique during the time 3,410 ± 160 years to 2,350 ± 540 years was 0.858 mm. per year. The average retreat rate of sea level from the main sand dune to the east was 92.030 mm. per year. The stand of the sea level during the 3700-2700 year, corresponding to the age of fossils at a depth of 4.20 m. was 3,730 ± 180 years. The age of Sating-Pra peninsula by dating of fossils on the top layer by radiocarbon, this was a last time before the sea retreated was 2,350 ± 540 years. According to the age of the sediments at the same location was 2,403 ± 113 years and the age of fossils on the top layer at Chian-Yai district, Nakhon Si Thammarat province was 2,380 ± 300 years. Age of fossils on the West side of the main sand dunes was higher than the East Coast. These results showed that, when the sand dunes of the Sating-Pra peninsula setting above sea level, the freshwater ecosystems were developed on west coast before east coast. While the East Coast marine ecosystems continue until the sea retreated to the current sea level.