インドネシア,スラウエシ南端Biraの離水サンゴの<14>^C年代

概要

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There are very fine marine terrace along the Bira to Pasir Putih coast southern part of south Sulawesi. These marine terrace consists of Miocene to Eocene reef coral with two notches. Position of one notch is in the one of high tide and another one is in 3-4m high above high tide with attched reef corals. ^<14>C ages of these emerged reef corals attached basement rock are dated by the Tandetron method at the Dating and Materials Research Center, Nagoya University. Result of age dating is shown is Table 1. Sea levels of 22to 40ka before present were 120 to 50m deeper than the present sea level. So uplifting rates calculate to 5.5 to 1.5mm/year. It is unresonable that two different rates estimate in same locality. Then sea level of 20 to 40ka before present must have been high geoid surface in this area.
名古屋大学の論文