Evolutionary events of Cainozoic Ostracoda of western Philippine Sea and paleoceanographical implications |
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| Authors: | Zhao Quanhong Robin Whatley |
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| Institution: | (1) Laboratory of Marine Geology of State Education Commission, Tongji University, 200092 Shanghai, China;(2) Institute of Earth Studies, University of Wales, Aberystwyth, United Kingdom |
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| Abstract: | The Oligocene ostracod fauna of IISDP Site 292 of the western Philippine Sea was marked by high density, diversity and origination,
probably reflecting a favorable period for deep-sea Ostraroda; while the sharp decrease in dtmsity and diversity as well as
the repeatedly occurring vxtinctions in thc. Neogene may indicate the deterioration in bottom-water environmcnts at that tlme.
Five rriajor faunal changes have been recognized in terms of density, diversity and evolutionary artivity (origination and
extinction), occurring in the earliest Oligocene (PI8), mid-Oligocene (P21), earliest Miocene (N4), early Middle Miocene (N8)
and late Pliocene (N21). respectively. These changes in ostracod faunas are suggested to represent short-term events related
to global paleoceanographical changes and to record the Cainozoic cooling history of the West Pacific Ocean and Philippine
Sea deep-water.
Project supported by the National Natural Science Foundation of China (Grant No. 49676287). |
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| Keywords: | Cainozoic paleoceanography Ostracoda Philippine Sea |
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