Development of coral reefs of the Ryukyu Islands (southwest Japan, East China Sea) during Pleistocene sea-level change

Nakamori, Toru; Iryu, Yasufumi; Yamada, Tsutomu

doi:10.1016/0037-0738(95)00045-a

Cited by 44 publications

(22 citation statements)

References 12 publications

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“…Apparently, there is no in-situ coral framework. These facies were regarded as relating to either a reef environment shallower than 60 m, an outer reef zone at depths of a few metres to 150 m, or a relatively flat and shallow platform (Nakamori et al, 1995;Sakai, 2003). All of the facies described in the lower units of the Ryukyu Group are similar to those described from the lower sections in the New Caledonian this study) and Australian Great Barrier Reef Webster and Davies, 2003) sequences, and further afield, in the Belize sections (Gischler et al, 2010).…”

Section: Age Of Reef Initiation: a Global Appraisalmentioning

confidence: 95%

“…Only the so-called "coral limestones", restricted to the uppermost sections of the Ryukyu Group (Nakamori et al, 1995) and ranging in age from about 0.8 Ma to less than 100 ka (Yamamoto et al, 2006), consist of typical coralgal frameworks to matrix-supported, inplace coral colonies. They are interpreted as representing shallow reef-flat to fore-reef settings.…”

Section: Age Of Reef Initiation: a Global Appraisalmentioning

confidence: 99%

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Revisiting the Quaternary development history of the western New Caledonian shelf system: From ramp to barrier reef

Montaggioni¹,

Cabioch

Thouveny

et al. 2011

Marine Geology

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Section: Age Of Reef Initiation: a Global Appraisalmentioning

confidence: 95%

Section: Age Of Reef Initiation: a Global Appraisalmentioning

confidence: 99%

Revisiting the Quaternary development history of the western New Caledonian shelf system: From ramp to barrier reef

Montaggioni¹,

Cabioch

Thouveny

et al. 2011

Marine Geology

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“…Combined with coral dating or biostratigraphy, the identification of coralgal biofacies and biological crusts provides information on reef environment and gives reliable bathymetric ranges in comparison with their modern counterparts. In the Indo-Pacific Province, such studies were made in the Quaternary reef environments of the Ryukyus Islands Nakamori et al, 1995;Iryu et al, 1998), Hawaii (Webster et al, 2006), Papua New Guinea (Webster et al, 2004a), Great Barrier reef (Braga and Aguirre, 2004;Davies et al, 2004), New Caledonia (Cabioch et al, 1995;Payri and Fig. 2.…”

Section: Introductionmentioning

confidence: 99%

Nature and biological composition of the New Caledonian outer barrier reef slopes

et al. 2008

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“…The ages were calculated using the global calibration curve proposed by Ito (1993) (Kaneko and Ito, 2006) and McArthur and Howarth (2004) Sagawa et al, 2001Sagawa et al, , 2001Sagawa et al, , 2005Yamamoto et al, 2006, 2003Nakamori et al 1999 0 …”

mentioning

confidence: 99%

沖縄本島南部に分布する琉球層群の層序

Sagae

Humblet

Odawara

et al. 2012

Jour. Geol. Soc. Japan

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The Pleistocene Ryukyu Group, composed of reef-complex deposits, crops out in southern Okinawa-jima, Ryukyu Islands, southwestern Japan. Here, based on new investigations, we revise the previous stratigraphic scheme for the Ryukyu Group and provide a formal stratigraphic description. In the study area, the Ryukyu Group comprises the Itoman, Naha, and Minatogawa formations. The Itoman Formation, composed mainly of coralline algal limestone, is thin (> m thick) and sporadically distributed. The Naha Formation rests unconformably on the Itoman Formation, reaches m in thickness, and is exposed at elevations of up to ca. m. The Naha Formation is divisible into four units; each unit is composed of coral limestone overlain by rhodolith, Cycloclypeus-Operculina, and detrital limestones, showing a deepening-upward sequence. The contact between the upper two units (units and ) is unconformable; this unconformity is present in other areas in Okinawa-jima, such as Yomitan, the Motobu Peninsula, and Ie-jima. Calcareous nannofossil assemblages indicate that deposition of the Naha Formation began at . -. Ma, and continued until after .Ma. The Itoman Formation and the lowest interval of the Naha Formation are coeval, and they represent, respectively, reef and off-reef facies of reef-complex deposits. The Minatogawa Formation rests unconformably on the Naha Formation, reaches m in thickness, and consists of well-sorted detrital and coral limestones that are thought to have been deposited in a shallow lagoon (moat); its surface exposure is confined to elevations of less than m. The geologic age of the Minatogawa Formation is unknown at this time.

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Development of coral reefs of the Ryukyu Islands (southwest Japan, East China Sea) during Pleistocene sea-level change

Cited by 44 publications

References 12 publications

Revisiting the Quaternary development history of the western New Caledonian shelf system: From ramp to barrier reef

Revisiting the Quaternary development history of the western New Caledonian shelf system: From ramp to barrier reef

Nature and biological composition of the New Caledonian outer barrier reef slopes

沖縄本島南部に分布する琉球層群の層序

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