Singh, Raj K; Gupta, Anil K (2004): Relative abunances of benthic foraminifera in Late Oligocene to Miocene sediments of ODP Hole 121-757B from the southeastern Indian Ocean (Appendix Table 1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.676895, Supplement to: Singh, RK; Gupta, AK (2005): Late Oligocene-Miocene paleoceanographic evolution of the southeastern Indian Ocean: evidence from deep-sea benthic foraminifera (ODP Site 757). Marine Micropaleontology, 51(1-2), 153-170, https://doi.org/10.1016/j.marmicro.2003.10.003
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Abstract:
We quantitatively analyzed deep-sea benthic foraminifera from >125 µm size fraction from Ocean Drilling Program (ODP) Site 757 to understand deep-sea paleoceanographic changes in the southeastern Indian Ocean during the late Oligocene-Miocene (26.5–5.35 Ma). We used the knowledge of the ecology of Recent deep-sea benthic foraminifera for environmental interpretations. Factor and cluster analyses were run using percentages of 46 highest-ranked species that helped identify six biofacies defining six clusters of samples. The faunal data document a major shift in deep-sea ventilation, organic carbon flux and productivity at ~8.3 Ma, coinciding with the major intensification of the Indian Ocean monsoon system. This marks a change from cold and well-oxygenated deep waters with low and pulsed organic carbon flux during 26.5 to ~8.3 Ma to oxygen-poor deep waters with sustained flux of organic matter. From 15.0 to 7.6 Ma, the deep-sea currents were stronger in the southeastern Indian Ocean probably due to major expansion of the East Antarctic ice sheet and increased production of deep waters and in turn increased deep-sea circulation. The productivity increased in the Indo-Pacific region in the late Miocene and the modern monsoon regime probably established at 8.3 Ma.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: -17.024000 * Longitude: 88.181600
Date/Time Start: 1988-06-01T11:00:00 * Date/Time End: 1988-06-04T06:15:00
Minimum DEPTH, sediment/rock: 39.21 m * Maximum DEPTH, sediment/rock: 103.08 m
Event(s):
121-757B * Latitude: -17.024000 * Longitude: 88.181600 * Date/Time Start: 1988-06-01T11:00:00 * Date/Time End: 1988-06-04T06:15:00 * Elevation: -1663.0 m * Penetration: 374.8 m * Recovery: 271.94 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg121 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 43 cores; 374.8 m cored; 0 m drilled; 72.6 % recovery
Comment:
Age model of Peirce et al. (1989), numerical ages based on Berggren et al. (1995)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | AGE | Age | ka BP | Geocode | ||
| 3 | Sample code/label | Sample label | Gupta, Anil K | DSDP/ODP/IODP sample designation | ||
| 4 | Anomalina globulosa | A. globulosa | % | Gupta, Anil K | Counting >125 µm fraction | |
| 5 | Astrononion umbilicatulum | A. umbilicatulum | % | Gupta, Anil K | Counting >125 µm fraction | |
| 6 | Bolivina pusilla | B. pusilla | % | Gupta, Anil K | Counting >125 µm fraction | |
| 7 | Bolivina silvestrina | B. silvestrina | % | Gupta, Anil K | Counting >125 µm fraction | |
| 8 | Bulimina alazanensis | B. alazanensis | % | Gupta, Anil K | Counting >125 µm fraction | |
| 9 | Bulimina macilenta | B. macilenta | % | Gupta, Anil K | Counting >125 µm fraction | |
| 10 | Buliminella carteri | B. carteri | % | Gupta, Anil K | Counting >125 µm fraction | |
| 11 | Cassidulina carinata | C. carinata | % | Gupta, Anil K | Counting >125 µm fraction | |
| 12 | Cassidulina laevigata | C. laevigata | % | Gupta, Anil K | Counting >125 µm fraction | |
| 13 | Cibicides bradyi | C. bradyi | % | Gupta, Anil K | Counting >125 µm fraction | |
| 14 | Cibicides cicatricosus | C. cicatricosus | % | Gupta, Anil K | Counting >125 µm fraction | |
| 15 | Cibicides pseudoungerianus | C. pseudoungerianus | % | Gupta, Anil K | Counting >125 µm fraction | |
| 16 | Cibicides wuellerstorfi | C. wuellerstorfi | % | Gupta, Anil K | Counting >125 µm fraction | |
| 17 | Discorbis subvilardeboanus | D. subvilardeboanus | % | Gupta, Anil K | Counting >125 µm fraction | |
| 18 | Eggerella bradyi | E. bradyi | % | Gupta, Anil K | Counting >125 µm fraction | |
| 19 | Ehrenbergina hystrix | E. hystrix | % | Gupta, Anil K | Counting >125 µm fraction | |
| 20 | Epistominella exigua | E. exigua | % | Gupta, Anil K | Counting >125 µm fraction | |
| 21 | Epistominella guptaae | E. guptaae | % | Gupta, Anil K | Counting >125 µm fraction | |
| 22 | Evolvocassidulina bradyi | E. bradyi | % | Gupta, Anil K | Counting >125 µm fraction | |
| 23 | Favocassidulina australis | F. australis | % | Gupta, Anil K | Counting >125 µm fraction | |
| 24 | Favocassidulina indica | F. indica | % | Gupta, Anil K | Counting >125 µm fraction | |
| 25 | Francesita advena | F. advena | % | Gupta, Anil K | Counting >125 µm fraction | |
| 26 | Gavelinopsis lobatulus | G. lobatulus | % | Gupta, Anil K | Counting >125 µm fraction | |
| 27 | Globocassidulina oblonga | G. oblonga | % | Gupta, Anil K | Counting >125 µm fraction | |
| 28 | Globocassidulina obtusa | G. obtusa | % | Gupta, Anil K | Counting >125 µm fraction | |
| 29 | Globocassidulina subglobosa | G. subglobosa | % | Gupta, Anil K | Counting >125 µm fraction | |
| 30 | Gyroidinoides cibaoensis | G. cibaoensis | % | Gupta, Anil K | Counting >125 µm fraction | |
| 31 | Gyroidinoides nitidula | G. nitidula | % | Gupta, Anil K | Counting >125 µm fraction | |
| 32 | Gyroidinoides polius | G. polius | % | Gupta, Anil K | Counting >125 µm fraction | |
| 33 | Nonionella auris | N. auris | % | Gupta, Anil K | Counting >125 µm fraction | |
| 34 | Nuttallides umbonifera | N. umbonifera | % | Gupta, Anil K | Counting >125 µm fraction | |
| 35 | Oridorsalis umbonatus | O. umbonatus | % | Gupta, Anil K | Counting >125 µm fraction | |
| 36 | Orthomorphina columnaris | O. columnaris | % | Gupta, Anil K | Counting >125 µm fraction | |
| 37 | Osangularia culter | O. culter | % | Gupta, Anil K | Counting >125 µm fraction | |
| 38 | Pleurostomella alternans | P. alternans | % | Gupta, Anil K | Counting >125 µm fraction | |
| 39 | Pleurostomella brevis | P. brevis | % | Gupta, Anil K | Counting >125 µm fraction | |
| 40 | Pullenia bulloides | P. bulloides | % | Gupta, Anil K | Counting >125 µm fraction | |
| 41 | Pullenia quinqueloba | P. quinqueloba | % | Gupta, Anil K | Counting >125 µm fraction | |
| 42 | Quadrimorphina laevigata | Q. laevigata | % | Gupta, Anil K | Counting >125 µm fraction | |
| 43 | Rectuvigerina royoi | R. royoi | % | Gupta, Anil K | Counting >125 µm fraction | |
| 44 | Robulus nicobarensis | R. nicobarensis | % | Gupta, Anil K | Counting >125 µm fraction | |
| 45 | Sphaeroidina bulloides | S. bulloides | % | Gupta, Anil K | Counting >125 µm fraction | |
| 46 | Stilostomella lepidula | S. lepidula | % | Gupta, Anil K | Counting >125 µm fraction | |
| 47 | Stilostomella subspinosa | S. subspinosa | % | Gupta, Anil K | Counting >125 µm fraction | |
| 48 | Uvigerina cushmani | U. cushmani | % | Gupta, Anil K | Counting >125 µm fraction | |
| 49 | Uvigerina proboscidea | U. proboscidea | % | Gupta, Anil K | Counting >125 µm fraction |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4277 data points
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