Biostratigraphy of the Mussau Trench (Caroline Basin) |
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| Authors: | Albert G Ablaev Vladimir D Khudik Marya G Biryulina Sergei P Pletnev Akbar A Ashurov |
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| Institution: | (1) Pacific Oceanological Institute, 690032 Vladivostok, USSR;(2) Far East Geological Institute, 690022 Vladivostok, USSR;(3) Geological Institute, 109017 Moscow, USSR |
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| Abstract: | A sedimentary rock complex overlays the deep layers of oceanic crust in the Mussau Trench (and the conjugated underwater ridge) of the Caroline Basin. Paleontological analyses supported the previous idea of Oligocene-Quaternary deposits. In addition, Upper Cretaceous (Acila ex gr. demessa, Anisomyon sp., and others) and Eocene (Heterostegina sp., Discocyclina sp., and others) deposits have been found, suggesting shallow water environments in Late Cretaceous-Early Cenozoic time. Later on, regional submergence started. The complex of the deep-seated formations of the Mussau Trench is not younger than the Early Cretaceous oceanic crust of the Ontong-Java Plateau. |
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