Bulletin of the Geological Society of Malaysia, Volume 3, March 1970, pp. 135 – 137
University of Malaya
Abstract: Specimens of Tridacna sp. (giant clam) shell in position of growth from near high-tide level on the foreshore in the Tambelan Islands, dated by the radio-carbon method, indicate that the sea level there was relatively higher by at least 0.3 m at 5460 ± 110 years B.P., and 0.4 m at 5270 ± 110 years B.P. Dating of a small tree bole from peat below low-tide level in the Bunguran (Natuna) Islands indicates that the sea level there was relatively lower by at least 0.7 m at 6260 ± 120 years B.P.