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      Sequential evolution and diagenesis of Pleistocene coral reefs (South Sinai, Egypt)

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      Sedimentary Geology
      Elsevier BV

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          Oxygen isotopes, ice volume and sea level

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            Quaternary Sea Level Fluctuations on a Tectonic coast: New 230Th/234U Dates from the Huon Peninsula, New Guinea

            Emerged coral reef terraces on the Huon Peninsula in New Guinea were reported in a reconnaissance dating study by Veeh and Chappell 1970. Age definition achieved was not good for several important terraces, and we report here a series of new 230Th/234U dates, which further clarify the history of late Quaternary eustatic sea level fluctuations. More than 20 reef complexes are present, ranging well beyond 250,000 yr old: we are concerned with the seven lowest complexes. Major reef-building episodes dated by 30Th/234U are reef complex I at 5–9 ka (kilo anno = 1000 yr), r.c. IIIb at 41 ka (four dates), r.c. IV at 61 ka (four dates), r.c. V at 85 ka (two dates), r.c. VI at 107 ka (two dates), and r.c. VII at 118–142 ka. Complex II was previously dated by 14C at 29 ka: this age has not yet been confirmed, and may be only a lower limit. The reef crests were built during or immediately before intervals of sea level maxima, when rates of rising sea level and tectonic uplift briefly coincided. The culmination of each reef-building episode was only a few thousand years in duration, and multiple dates from the same reef complex generally group within the statistical errors of the individual dates.
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              The Astronomical Theory of Climatic Change: Barbados Data

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                Author and article information

                Journal
                Sedimentary Geology
                Sedimentary Geology
                Elsevier BV
                00370738
                June 1992
                June 1992
                : 78
                : 1-2
                : 59-79
                Article
                10.1016/0037-0738(92)90113-6
                0d635a62-39f6-4efc-a6db-bdbbd675b5e6
                © 1992

                http://www.elsevier.com/tdm/userlicense/1.0/

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