Middle Miocene to Pleistocene Planktonic Foraminiferal Biostratigraphy in the Eastern Equatorial Pacific Ocean
Middle Miocene to Pleistocene Planktonic Foraminiferal Biostratigraphy in the Eastern Equatorial Pacific Ocean
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DOI：
10.2517/1342-8144-17.1.91
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发表时间：
2013-04
期刊：
影响因子：
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通讯作者：
H. Hayashi;Kyoko Idemitsu;B. Wade;Yuki Idehara;K. Kimoto;H. Nishi;H. Matsui
中科院分区：
文献类型：
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作者：
H. Hayashi;Kyoko Idemitsu;B. Wade;Yuki Idehara;K. Kimoto;H. Nishi;H. Matsui
Abstract. We present a detailed dataset of planktonic foraminiferal biohorizons to enhance a biostratigraphy for the eastern equatorial Pacific. Middle Miocene to Pleistocene planktonic foraminiferal biostratigraphy is established using 269 samples from Cores 1H to 40H recovered from Integrated Ocean Drilling Program (IODP) Hole U1338B. In addition to the onboard study of Hole U1338A, a total of 60 biohorizons are recognized with three grades of reliability. Generally, these biohorizons are in agreement with each other and consistent with shipboard magnetostratigraphy, except for several discrepancies that may be caused by ecological diachronous processes. The studied sequence can be correlated with Zone M7 to Subzone PT1b. However, we cannot detect Miocene zones M6, M10, and M12 in this sequence because of discrepancies in some zonal marker biohorizons.
