Late Oligocene through early Pleistocene calcareous nannofossils of ODP Leg 115 holes
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| Format: | Dataset Open Access |
| Sprache: | en |
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PANGAEA
1990
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| _version_ | 1867168556275204096 |
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| author | Rio, Domenico Fornaciari, Eliana Raffi, Isabella |
| author_facet | Rio, Domenico Fornaciari, Eliana Raffi, Isabella |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The chronostratigraphy, the calcareous nannofossil biochronology, and the biostratigraphy of the Miocene and Pliocene sediments retrieved during Leg 115 in the equatorial western Indian Ocean are presented and discussed. Most of the zonal boundaries of the standard 1971 zonation of Martini and the 1973 zonation of Bukry are easily recognized in these low-latitude sediments. We also comment on the secondary events that are proposed in the literature to improve the biostratigraphic resolution provided by the standard zonations. The study of calcareous nannofossil biostratigraphy and taphonomy of sequences from the Northern Mascarene Plateau area, which was drilled to investigate the Neogene history of carbonate flux and dissolution, indicate that the accumulation of carbonates in this area results from a complex interplay among carbonate bioproductivity, carbonate removal by chemical dissolution and mechanical erosion, and carbonate addition by mass and current transport. In spite of these drawbacks, major changes and trends in carbonate accumulation can be recognized, most of which, if not all, correlate with major steps in the evolution of the Neogene climatic system. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_755941 |
| institution | PANGAEA |
| language | en |
| publishDate | 1990 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Late Oligocene through early Pleistocene calcareous nannofossils of ODP Leg 115 holes Rio, Domenico Fornaciari, Eliana Raffi, Isabella 115-705A; 115-707A; 115-708A; 115-709A; 115-709B; 115-709C; 115-710A; 115-710B; 115-711A; 115-711B; 115-712A; 115-713A; 115-714A; 115-714B; 115-715A; 115-716B; DRILL; Drilling/drill rig; Indian Ocean; Joides Resolution; Lakshadweep Sea; Leg115; Ocean Drilling Program; ODP; South Indian Ridge, South Indian Ocean The chronostratigraphy, the calcareous nannofossil biochronology, and the biostratigraphy of the Miocene and Pliocene sediments retrieved during Leg 115 in the equatorial western Indian Ocean are presented and discussed. Most of the zonal boundaries of the standard 1971 zonation of Martini and the 1973 zonation of Bukry are easily recognized in these low-latitude sediments. We also comment on the secondary events that are proposed in the literature to improve the biostratigraphic resolution provided by the standard zonations. The study of calcareous nannofossil biostratigraphy and taphonomy of sequences from the Northern Mascarene Plateau area, which was drilled to investigate the Neogene history of carbonate flux and dissolution, indicate that the accumulation of carbonates in this area results from a complex interplay among carbonate bioproductivity, carbonate removal by chemical dissolution and mechanical erosion, and carbonate addition by mass and current transport. In spite of these drawbacks, major changes and trends in carbonate accumulation can be recognized, most of which, if not all, correlate with major steps in the evolution of the Neogene climatic system. |
| title | Late Oligocene through early Pleistocene calcareous nannofossils of ODP Leg 115 holes |
| topic | 115-705A; 115-707A; 115-708A; 115-709A; 115-709B; 115-709C; 115-710A; 115-710B; 115-711A; 115-711B; 115-712A; 115-713A; 115-714A; 115-714B; 115-715A; 115-716B; DRILL; Drilling/drill rig; Indian Ocean; Joides Resolution; Lakshadweep Sea; Leg115; Ocean Drilling Program; ODP; South Indian Ridge, South Indian Ocean |
| url | https://doi.org/10.1594/PANGAEA.755941 |