C-14 ages of coastal plains and coral reefs in Cook Islands, the South Pacific

Hiroshi Moriwaki; Mitsuru Okuno; Kei Kawai; Toshiro Nagasako; Tatsuo Nakai; Gerald MCCORMAC; George COWAN; Paul T. MAOATE

doi:10.14866/ajg.2011f.0.100009.0

Annual Meeting of the Association of Japanese Geographers, Autumn 2011

Session ID : P720

DOI https://doi.org/10.14866/ajg.2011f.0.100009.0

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Host: The Association of Japanese Geographers

C-14 ages of coastal plains and coral reefs in Cook Islands, the South Pacific

*Hiroshi Moriwaki, Mitsuru Okuno, Kei Kawai, Toshiro Nagasako, Tatsuo Nakai, Gerald MCCORMAC, George COWAN, Paul T. MAOATE

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Keywords: C-14 age, Coastal plain, Coral reef, Cook Islands, South Pacific

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Abstract

We obtained C-14 dates on beach ridge deposits on Rarotonga and on emerged corals on Mangaia, Cook Islands, South Pacific. Those dates show that beach ridge plain began to form at 3,500 – 4,000 BP on Rarotonga, and a sea level at ca. 5,600 – 5,700 BP shortly before the age of the highest sea level occurred at 0.65 m above present mean sea level on Mangaia.

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