Neogene calcareous nannofossil abundance and datums of ODP Site 186-1150 and 186-1151 sediments
Fuente:
PANGAEA
Enregistré dans:
| Auteur principal: | |
|---|---|
| Format: | Dataset Open Access |
| Langue: | en |
| Publié: |
PANGAEA
2003
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1867169505826832384 |
|---|---|
| author | Li, Jingfen |
| author_facet | Li, Jingfen |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Calcareous nannofossil assemblages were studied from Ocean Drilling Program Holes 1150A, 1150B, 1151A, 1151C, and 1151D in order to estimate the age of sediments drilled in the Japan Trench of the western Pacific Ocean. The abundance and species diversity of nannofossil flora are generally low but are sufficient to show that the sedimentary sequences range from Quaternary to Miocene in age (nannofossil Zones CN15-CN3). The abundance of Coccolithus pelagicus, a cold-water indicator, was studied from sediments younger than 3.83 Ma from both Holes 1150A and 1151A in order to elucidate past climate conditions. Between 3.83 and 2.82 Ma, the abundance of C. pelagicus was generally low, but abundance increased significantly after 2.82 Ma. In agreement with previous studies, this increase appears to be related to a change in the current system around the western Pacific Ocean and eastern Atlantic Ocean that occurred in response to the final elevation of the Isthmus of Panama. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_783092 |
| institution | PANGAEA |
| language | en |
| publishDate | 2003 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Neogene calcareous nannofossil abundance and datums of ODP Site 186-1150 and 186-1151 sediments Li, Jingfen 186-1150A; 186-1150B; 186-1151A; 186-1151C; 186-1151D; DRILL; Drilling/drill rig; Joides Resolution; Leg186; North Pacific Ocean; Ocean Drilling Program; ODP Calcareous nannofossil assemblages were studied from Ocean Drilling Program Holes 1150A, 1150B, 1151A, 1151C, and 1151D in order to estimate the age of sediments drilled in the Japan Trench of the western Pacific Ocean. The abundance and species diversity of nannofossil flora are generally low but are sufficient to show that the sedimentary sequences range from Quaternary to Miocene in age (nannofossil Zones CN15-CN3). The abundance of Coccolithus pelagicus, a cold-water indicator, was studied from sediments younger than 3.83 Ma from both Holes 1150A and 1151A in order to elucidate past climate conditions. Between 3.83 and 2.82 Ma, the abundance of C. pelagicus was generally low, but abundance increased significantly after 2.82 Ma. In agreement with previous studies, this increase appears to be related to a change in the current system around the western Pacific Ocean and eastern Atlantic Ocean that occurred in response to the final elevation of the Isthmus of Panama. |
| title | Neogene calcareous nannofossil abundance and datums of ODP Site 186-1150 and 186-1151 sediments |
| topic | 186-1150A; 186-1150B; 186-1151A; 186-1151C; 186-1151D; DRILL; Drilling/drill rig; Joides Resolution; Leg186; North Pacific Ocean; Ocean Drilling Program; ODP |
| url | https://doi.org/10.1594/PANGAEA.783092 |