Villa, Giuliana; Lupi, Claudia; Cobianchi, Miriam; Florindo, Fabio; Pekar, Stephen F (2008): Range chart of calcareous nannofossils from ODP Hole 188-1165B (Table 1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.706554, Supplement to: Villa, G et al. (2008): A Pleistocene warming event at 1 Ma in Prydz Bay, East Antarctica: Evidence from ODP Site 1165. Palaeogeography, Palaeoclimatology, Palaeoecology, 260(1-2), 230-244, https://doi.org/10.1016/j.palaeo.2007.08.017
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Abstract:
Bio- and magnetostratigraphic age data and nannofossil assemblage analysis from ODP Site 1165 evidence an anomalous warming event of the surface waters in and around Prydz Bay during the Early Pleistocene, approximately 1 Ma. This results from an increase in the abundance of nannofossils at Site 1165, that occurred at 1 Ma. Detailed high-resolution sampling permits a new bio-magnetostratigraphic interpretation for ODP Site 1165. A decrease in delta18O values at Sites 1165 and 1167 also occurs at this time, supporting the presence of warming conditions in the Prydz Bay area. A return to colder surface waters, indicated by the absence or rare occurrence of nannofossils in the upper cores from Site 1165, suggests that more stable glacial conditions existed in the Prydz Bay basin, for the last 900 ka.
The biogenic carbonate sequence identified at Site 1167 is similar to the carbonate shales recovered from the Cape Roberts Project 1. Both have been dated at about 1 Ma, supporting the idea that a significant surface waters warming occurred during the Pleistocene. These data and the presence of calcareous nannofossils from locations around the Antarctic continent also suggest that the warming event was not limited to the analysed basin, but it extended around the East Antarctic continent. These new evidence call for a re-evaluation of the notion that the East Antarctic Ice-Sheet has experienced stable conditions similar to today since the late Neogene.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: -64.379650 * Longitude: 67.219050
Date/Time Start: 2000-01-29T05:15:00 * Date/Time End: 2000-02-04T05:30:00
Minimum DEPTH, sediment/rock: 0.09 m * Maximum DEPTH, sediment/rock: 16.79 m
Event(s):
188-1165B * Latitude: -64.379650 * Longitude: 67.219050 * Date/Time Start: 2000-01-29T05:15:00 * Date/Time End: 2000-02-04T05:30:00 * Elevation: -3537.6 m * Penetration: 682.2 m * Recovery: 434.04 m * Location: Indian Ocean * Campaign: Leg188 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 76 cores; 682.2 m cored; 0 m drilled; 63.6 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Sample code/label | Sample label | Villa, Giuliana | DSDP/ODP/IODP sample designation | ||
| 3 | Nannofossil abundance | Nannos abund | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 4 | Nannofossils preservation | Nannos preserv | Villa, Giuliana | Smear slide analysis | G = good, M = moderate, P = poor | |
| 5 | Species richness | S | Villa, Giuliana | Smear slide analysis | ||
| 6 | Calcidiscus leptoporus | C. leptoporus | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 7 | Ceratolithus telesmus | C. telesmus | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 8 | Coccolithus pelagicus | C. pelagicus | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 9 | Coccolithus pelagicus ssp. braarudii | C. pelagicus ssp. braarudii | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 10 | Crenalithus japonicus | C. japonicus | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 11 | Crenalithus doronicoides | C. doronicoides | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 12 | Emiliania huxleyi | E. huxleyi | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 13 | Gephyrocapsa caribbeanica | G. caribbeanica | #/mm2 | Villa, Giuliana | Smear slide analysis | large |
| 14 | Gephyrocapsa caribbeanica | G. caribbeanica | #/mm2 | Villa, Giuliana | Smear slide analysis | medium |
| 15 | Gephyrocapsa caribbeanica | G. caribbeanica | #/mm2 | Villa, Giuliana | Smear slide analysis | small |
| 16 | Gephyrocapsa oceanica | G. oceanica | #/mm2 | Villa, Giuliana | Smear slide analysis | large |
| 17 | Gephyrocapsa oceanica | G. oceanica | #/mm2 | Villa, Giuliana | Smear slide analysis | medium |
| 18 | Gephyrocapsa oceanica | G. oceanica | #/mm2 | Villa, Giuliana | Smear slide analysis | small |
| 19 | Gephyrocapsa omega | G. omega | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 20 | Gephyrocapsa spp. | Gephyrocapsa spp. | #/mm2 | Villa, Giuliana | Smear slide analysis | small |
| 21 | Gephyrocapsa aperta | G. aperta | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 22 | Gephyrocapsa ericsonii | G. ericsonii | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 23 | Gephyrocapsa muellerae | G. muellerae | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 24 | Helicosphaera carteri | H. carteri | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 25 | Helicosphaera burkei | H. burkei | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 26 | Pseudoemiliania pacifica | P. pacifica | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 27 | Pseudoemiliania lacunosa ovata | P. lac. ovata | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 28 | Pseudoemiliania lacunosa | P. lacunosa | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 29 | Pseudoemiliania lacunosa | P. lacunosa | #/mm2 | Villa, Giuliana | Smear slide analysis | sp. 2 <7 µm |
| 30 | Pseudoemiliania lacunosa lacunosa | P. lacunosa lacunosa | #/mm2 | Villa, Giuliana | Smear slide analysis | <7 µm |
| 31 | Pseudoemiliania lacunosa lacunosa | P. lacunosa lacunosa | #/mm2 | Villa, Giuliana | Smear slide analysis | >7 µm |
| 32 | Reticulofenestra asanoi | R. asanoi | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 33 | Reticulofenestra celtica | R. celtica | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 34 | Reticulofenestra minuta | R. minuta | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 35 | Umbilicosphaera spp. | Umbilicosphaera spp. | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 36 | Umbilicosphaera hulburtiana | U. hulburtiana | #/mm2 | Villa, Giuliana | Smear slide analysis | |
| 37 | Thoracosphaera spp. | Thoracosphaera spp. | Villa, Giuliana | Smear slide analysis | X = present., - = absent |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3886 data points
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