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

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          Abstract

          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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            Milankovitch Hypothesis Supported by Precise Dating of Coral Reefs and Deep-Sea Sediments

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              Alaskan earthquake of 1964 and Chilean earthquake of 1960: Implications for arc tectonics

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                Author and article information

                Journal
                applab
                Quaternary Research
                Quat. res.
                Elsevier BV
                0033-5894
                1096-0287
                June 1974
                January 2017
                : 4
                : 02
                : 185-205
                Article
                10.1016/0033-5894(74)90007-6
                04a36bca-1ad7-4169-93c1-cd2177d985b3
                © 1974

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

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