Study on the Holocene sea-level change and coastal evolution in the Cook Islands, south Pacific

2010 Fiscal Year Final Research Report

• Project/Area Number: 20401004
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 海外学術
• Research Field: Geography
• Research Institution: Kagoshima University
• Principal Investigator: MORIWAKI Hiroshi 鹿児島大学, 法文学部, 教授 (70200459)
• Co-Investigator(Kenkyū-buntansha): OKUNO Mitsuru 福岡大学, 理学部, 教授 (50309887) ; KAWAI Kei 国際島嶼教育研究センター (60332897)
• Project Period (FY): 2008 – 2010
• Keywords: クック諸島 / 南太平洋 / 海岸平野 / サンゴ礁 / 海面変化 / 地形変化 / 海岸環境変化 / 完新世

Research Abstract

We examined the occurrences of various landforms constituting coastal plains, the relation of postglacial coastal landforms to those of the last interglacial, Holocene coastal developments and sea-level changes in Rarotonga, Aitutaki and Mangaia islands, Cook Islands, on the basis of the investigation of landforms and sediments of coastal plains and coral reefs. In Rarotonga focused in this study, after sea level attained present sea level c. 5,000-6,000 years ago, coastal plains have generally emerged since c. 4,000-5,000 years ago.

Research Products

• [Journal Article] 東ポリネシアの初期居住に関する自然史的背景 (2008)
  • Author(s): 森脇広
  • Journal Title: 近森正(編)サンゴ礁の景観史-クック諸島調査の論集- Pages: 500
• [Journal Article] Geomorphic developments of the coastal landforms on Rarotonga, Cook Islands, South Pacific Ocean
  • Author(s): Moriwaki, H., Nagasako, T., Okuno, M., Kawai, K., McCormack, G., Cowan, G. and P. T. Maoate
  • Journal Title: Festschrift for Ron Crocombe Volume: (印刷中)
• [Presentation] 南太平洋,クック諸島,ラロトンガ島の海岸平野とサンゴ礁の地形形成 (2011)
  • Author(s): 森脇広・永迫俊郎・奥野充・河合渓・中井達郎・Gerald McCormack・George Cowan・Paul T. Maoate
  • Organizer: 日本地理学会大会
  • Place of Presentation: 明治大学
  • Year and Date: 20110300
• [Presentation] Shell colour polymorphism of the intertidal gastropod Nerita plicata inhabiting the Cook Islands (2010)
  • Author(s): Kawai, K., Moriwaki, H., Nagasako, T., Okuno, M., Cowan, G., McCormack, G. and Maoate, P. T.
  • Organizer: Conference for Festschrit for Ron Crocombe, Rarotonga, The Cook Islands Research Association in association with the Cook Islands Library and Museum Society and the University of the South Pacific Cook Islands Campus
  • Place of Presentation: University of the South Pacific Cook Islands Campus, Rarotonga, Cook Islands
  • Year and Date: 20100800
• [Presentation] Holocene geomorphic developments of coastal plains in the Cook Island and southern Kyushu of Japan (2010)
  • Author(s): Moriwaki, H., Nagasako, T., Okuno, M., Kawai, K., McCormack, G., Cowan, G. and Maoate, P. T.
  • Organizer: Conference for Festschrit for Ron Crocombe, Rarotonga, The Cook Islands Research Association in association with the Cook Islands Library and Museum Society and the University of the South Pacific Cook Islands Campus
  • Place of Presentation: University of the South Pacific Cook Islands Campus, Rarotonga, Cook Islands
  • Year and Date: 20100800
• [Presentation] 潮間帯上部に生息する巻貝の生息環境と殻色多様性に関する研究 (2010)
  • Author(s): 河合渓・森脇広・永迫俊郎・奥野充・Crocombe R.・McCormack G.・Cowan G.・Maoate P. T.
  • Organizer: 日本生態学会
  • Place of Presentation: 東京大学
  • Year and Date: 20100300
• [Presentation] 南太平洋,クック諸島,ラロトンガ島の海岸平野とサンゴ礁地形 (2009)
  • Author(s): 森脇広・永迫俊郎・奥野充・河合渓・Ron Crocombe・George Cowan, Paul T. Maoate
  • Organizer: 日本地理学会
  • Place of Presentation: 帝京大学
  • Year and Date: 20090300
• [Presentation] Holocene coastal environments and implications for human occupation in Rarotonga, Cook Islands (2008)
  • Author(s): Moriwaki, H., Chikamori, M., Okuno, M., Nakamura, T., Nagasako, T., and Lowe, D. J
  • Organizer: Japan-New Zealand International Symposium, Oral presentation
  • Place of Presentation: University of Waikato, Hamilton, New Zealand
  • Year and Date: 20080800