Abundance of stratigraphically important planktic foraminifera and biohorizons of ODP Site 186-1150 and Hole 186-1151A
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| Format: | Dataset Open Access |
| Sprache: | en |
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PANGAEA
2003
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| _version_ | 1867171363333079040 |
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| author | Hayashi, Hiroko Morishita, Chikako Oda, Motoyoshi |
| author_facet | Hayashi, Hiroko Morishita, Chikako Oda, Motoyoshi |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The planktonic foraminiferal biostratigraphy of Sites 1150 and 1151 drilled in the Japan Trench region during Ocean Drilling Program Leg 186 has been examined. At these drill sites, more than 1100 m of sediment, reaching to the middle Miocene, were obtained with good core recovery. Although planktonic foraminiferal records of the two sites are discontinuous, probably because of carbonate dissolution beneath the carbonate compensation depth, 16 stratigraphically important taxa of planktonic foraminifers were detected. Eight biohorizons were recognized in same stratigraphic order between these two sites. With respect to the diatom data, these eight planktonic foraminiferal biohorizons are possibly synchronous for correlating marine strata from the upper Miocene to Pleistocene in the Japan Trench region. The last occurrence of Neogloboquadrina asanoi falls within Olduvai Subchron. Therefore, the Pliocene/Pleistocene boundary of both sites is situated a little above this biohorizon. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_783487 |
| institution | PANGAEA |
| language | en |
| publishDate | 2003 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Abundance of stratigraphically important planktic foraminifera and biohorizons of ODP Site 186-1150 and Hole 186-1151A Hayashi, Hiroko Morishita, Chikako Oda, Motoyoshi 186-1150A; 186-1150B; 186-1151A; DRILL; Drilling/drill rig; Joides Resolution; Leg186; North Pacific Ocean; Ocean Drilling Program; ODP The planktonic foraminiferal biostratigraphy of Sites 1150 and 1151 drilled in the Japan Trench region during Ocean Drilling Program Leg 186 has been examined. At these drill sites, more than 1100 m of sediment, reaching to the middle Miocene, were obtained with good core recovery. Although planktonic foraminiferal records of the two sites are discontinuous, probably because of carbonate dissolution beneath the carbonate compensation depth, 16 stratigraphically important taxa of planktonic foraminifers were detected. Eight biohorizons were recognized in same stratigraphic order between these two sites. With respect to the diatom data, these eight planktonic foraminiferal biohorizons are possibly synchronous for correlating marine strata from the upper Miocene to Pleistocene in the Japan Trench region. The last occurrence of Neogloboquadrina asanoi falls within Olduvai Subchron. Therefore, the Pliocene/Pleistocene boundary of both sites is situated a little above this biohorizon. |
| title | Abundance of stratigraphically important planktic foraminifera and biohorizons of ODP Site 186-1150 and Hole 186-1151A |
| topic | 186-1150A; 186-1150B; 186-1151A; DRILL; Drilling/drill rig; Joides Resolution; Leg186; North Pacific Ocean; Ocean Drilling Program; ODP |
| url | https://doi.org/10.1594/PANGAEA.783487 |