Eynaud, Frédérique; Cronin, Thomas M; Smith, Shannon A; Zaragosi, Sebastien; Mavel, J; Mary, Yannick; Mas, Virginie; Pujol, Claude (2009): (Table 1) Late Pleistocene planktonic foraminifera of Hole 302-M0004C [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.672078, Supplement to: Eynaud, F et al. (2009): Morphological variability of the planktonic foraminifer Neogloboquadrina pachyderma from ACEX cores: implications for late Pleistocene circulation in the Arctic Ocean. Micropaleontology, 55(2-3), 101-116
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Planktonic foraminifera populations were studied throughout the top 25 meters of the IODP ACEX 302 Hole 4C from the central Arctic Ocean at a resolution varying from 5cm (at the top of the record) to 10cm. Planktonic foraminifera occur in high absolute abundances only in the uppermost fifty centimetres and are dominated by the taxa Neogloboquadrina pachyderma. Except for a few intermittent layers below this level,most samples are barren of calcareous microfossils.Within the topmost sediments, Neogloboquadrina pachyderma specimens present large morphological variability in the shape and number of chambers in the finalwhorl, chamber sphericity, size, and coiling direction. Five morphotypeswere identified among the sinistral (sin.) population (Nps-1 to Nps-5), including a small form (Nps-5) that is similar to a non-encrusted normal form also previously identified in the modern Arctic Ocean watermasses. Twenty five percent of the sinistral population is made up by large specimens (Nps-2, 3, 4), with a maximal mean diameter larger than 250µm. Following observations made in peri-Arctic seas (Hillaire-Marcel et al. 2004, doi:10.1016/j.quascirev.2003.08.006), we propose that occurrence of these large-sized specimens of N. pachyderma (sin.) in the central Arctic Ocean sediments could sign North Atlantic water sub-surface penetration.
Further details:
Late Pleistocene planktonic foraminifera of Hole 302-M0004C (Addendum 2). hdl:10013/epic.32918.d001
Project(s):
Coverage:
Latitude: 87.867750 * Longitude: 136.189680
Date/Time Start: 2004-09-03T00:00:00 * Date/Time End: 2004-09-03T00:00:00
Minimum DEPTH, sediment/rock: 0.03 m * Maximum DEPTH, sediment/rock: 3.50 m
Event(s):
302-M0004C (ACEX-M4C) * Latitude: 87.867750 * Longitude: 136.189680 * Date/Time: 2004-09-03T00:00:00 * Elevation: -1287.9 m * IGSN: IBCR0302RHXS001 * Penetration: 37.33 m * Recovery: 25.6 m * Location: Arctic Ocean * Campaign: Exp302 (Arctic Coring Expedition, ACEX) * Basis: CCGS Captain Molly Kool (Vidar Viking)
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 | Eynaud, Frédérique | |||
| 3 | Depth, composite top | Depth comp top | mcd | Eynaud, Frédérique | Intercore correlation | |
| 4 | Neogloboquadrina pachyderma sinistral | N. pachyderma s | # | Eynaud, Frédérique | Counting >125 µm fraction | Morphotype NPS-1 |
| 5 | Neogloboquadrina pachyderma sinistral | N. pachyderma s | # | Eynaud, Frédérique | Counting >125 µm fraction | Morphotype NPS-2 |
| 6 | Neogloboquadrina pachyderma sinistral | N. pachyderma s | # | Eynaud, Frédérique | Counting >125 µm fraction | Morphotype NPS-3 |
| 7 | Neogloboquadrina pachyderma sinistral | N. pachyderma s | # | Eynaud, Frédérique | Counting >125 µm fraction | Morphotype NPS-4 |
| 8 | Neogloboquadrina pachyderma sinistral | N. pachyderma s | # | Eynaud, Frédérique | Counting >125 µm fraction | Morphotype NPS-5 |
| 9 | Neogloboquadrina pachyderma sinistral | N. pachyderma s | # | Eynaud, Frédérique | Counting >125 µm fraction | Total NPS |
| 10 | Neogloboquadrina pachyderma sinistral | N. pachyderma s | # | Eynaud, Frédérique | Counting >125 µm fraction | |
| 11 | Neogloboquadrina pachyderma dextral | N. pachyderma d | # | Eynaud, Frédérique | Counting >125 µm fraction | Morphotype NPD-1 |
| 12 | Neogloboquadrina pachyderma dextral | N. pachyderma d | # | Eynaud, Frédérique | Counting >125 µm fraction | Morphotype NPD-2 |
| 13 | Neogloboquadrina pachyderma dextral | N. pachyderma d | # | Eynaud, Frédérique | Counting >125 µm fraction | Total NPD |
| 14 | Number | No | Eynaud, Frédérique | |||
| 15 | Number | No | Eynaud, Frédérique | Number of counted squares (max 50) | ||
| 16 | Neogloboquadrina atlantica | N. atlantica | # | Eynaud, Frédérique | Counting >125 µm fraction | |
| 17 | Globigerina quinqueloba | G. quinqueloba | # | Eynaud, Frédérique | Counting >125 µm fraction | |
| 18 | Globigerina bulloides | G. bulloides | # | Eynaud, Frédérique | Counting >125 µm fraction | |
| 19 | Biogenic indeterminata | Biog indet | # | Eynaud, Frédérique | Counting >125 µm fraction | |
| 20 | Foraminifera, planktic | Foram plankt | # | Eynaud, Frédérique | Counting >125 µm fraction | |
| 21 | Sample type | Samp type | Eynaud, Frédérique | |||
| 22 | Split | Split | Eynaud, Frédérique | split | ||
| 23 | Foraminifera, planktic | Foram plankt | #/g | Eynaud, Frédérique | Counting >125 µm fraction | |
| 24 | Foraminifera, planktic | Foram plankt | #/g | Eynaud, Frédérique | Counting >125 µm fraction | #/10 g sediment |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
943 data points