Citation:

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.

RIS Citation BibTeX Citation Text Citation Facebook TwitterShow Map Google Earth

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)

Project(s):

Integrated Ocean Drilling Program / International Ocean Discovery Program (IODP)

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: (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

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Depth sed [m]	2 Sample label	3 Depth comp top [mcd] (Intercore correlation)	4 N. pachyderma s [#] (Morphotype NPS-1, Counting >1...)	5 N. pachyderma s [#] (Morphotype NPS-2, Counting >1...)	6 N. pachyderma s [#] (Morphotype NPS-3, Counting >1...)	7 N. pachyderma s [#] (Morphotype NPS-4, Counting >1...)	8 N. pachyderma s [#] (Morphotype NPS-5, Counting >1...)	9 N. pachyderma s [#] (Total NPS, Counting >125 µm f...)	10 N. pachyderma s [#] (Counting >125 µm fraction)	11 N. pachyderma d [#] (Morphotype NPD-1, Counting >1...)	12 N. pachyderma d [#] (Morphotype NPD-2, Counting >1...)	13 N. pachyderma d [#] (Total NPD, Counting >125 µm f...)	14 No	15 No (Number of counted squares (ma...)	16 N. atlantica [#] (Counting >125 µm fraction)	17 G. quinqueloba [#] (Counting >125 µm fraction)	18 G. bulloides [#] (Counting >125 µm fraction)	19 Biog indet [#] (Counting >125 µm fraction)	20 Foram plankt [#] (Counting >125 µm fraction)	21 Samp type	22 Split (split)	23 Foram plankt [#/g] (Counting >125 µm fraction)	24 Foram plankt [#/g] (#/10 g sediment, Counting >12...)
0.03	302-M0004C-1H-1,3-5	0.03	213	55	100	16	32	416	429	9	4	13	7	3	0	1	5	3	438	Aliquot	2 (1/4 obs)	2875	28746
0.08	302-M0004C-1H-1,8-10	0.08	371	96	3	16	0	486	494	8	0	8	5	2	0	1	4	0	499	Total sample	no	1967	19670
0.13	302-M0004C-1H-1,13-15	0.13	199	52	58	15	25	349	362	6	7	13	7	7	0	1	1	4	368	Aliquot	2 (1/4 obs)	1015	10148
0.18	302-M0004C-1H-1,18-20	0.18	233	60	8	9	0	310	315	5	0	5	5	4	0	4	0	0	319	Total sample	no	464	4642
0.23	302-M0004C-1H-1,23-25	0.23	213	55	59	19	38	384	396	4	3	7	7	3	0	0	6	0	397	Aliquot	2 (1/4 obs)	2739	27387
0.28	302-M0004C-1H-1,28-30	0.28	290	110	5	21	38	464	476	7	5	12	7	2	0	0	2	0	478	Aliquot	1 (1/2obs)	2474	24736
0.33	302-M0004C-1H-1,33-35	0.33	229	30	64	16	39	378	385	6	6	12	7	3	0	1	2	4	397	Aliquot	2 (1/4 obs)	2399	23993
0.38	302-M0004C-1H-1,38-40	0.38	294	53	5	10	12	374	382	7	1	8	7	8	0	1	1	0	384	Total sample	no	281	2806
0.43	302-M0004C-1H-1,43-45	0.43	24	8	11	2	5	50	53	2	0	2	6	50	0	0	0	1	53	Aliquot	2 (1/4 obs)	18	180
0.48	302-M0004C-1H-1,48-50	0.48	2	0	0	0	0	2	2	0	0	0	1	50	0	0	0	0	2	Aliquot	1 (1/2obs)	0	4
0.53	302-M0004C-1H-1,53-55	0.53	5	2	4	0	0	11	13	2	0	2	4	50	0	0	0	2	15	Aliquot	2 (1/4 obs)	5	45
0.58	302-M0004C-1H-1,58-60	0.58	23	13	0	7	1	44	45	1	0	1	5	50	0	0	0	0	45	Aliquot	1 (1/2obs)	7	68
0.68	302-M0004C-1H-1,68-70	0.68	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	0	0	Total sample	no	0	0
0.78	302-M0004C-1H-1,78-80	0.78	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	0	0	Total sample	no	0	0
0.88	302-M0004C-1H-1,88-90	0.88	2	2	0	0	0	4	4	0	0	0	2	50	0	0	0	0	4	Total sample	no	0	3
0.98	302-M0004C-1H-1,98-100	0.98	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	0	0	Total sample	no	0	0
1.08	302-M0004C-1H-1,108-110	1.08	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	0	0	Total sample	no	0	0
1.18	302-M0004C-1H-1,118-120	1.18	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	0	0	Total sample	no	0	0
1.28	302-M0004C-1H-1,128-130	1.28	1	0	0	0	0	1	1	0	0	0	1	50	?1	0	0	0	1	Total sample	no	0	1
1.38	302-M0004C-1H-1,138-140	1.38	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	0	0	Total sample	no	0	0
1.48	302-M0004C-1H-1,148-150	1.48	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	0	0	Total sample	no	0	0
1.59	302-M0004C-1H-2,8-10	1.59	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	0	0	Total sample	no	0	0
1.69	302-M0004C-1H-2,18-20	1.69	1	0	0	0	0	1	1	0	0	0	1	50	0	0	0	0	1	Total sample	no	0	1
1.79	302-M0004C-1H-2,28-30	1.79	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	0	0	Total sample	no	0	0
1.89	302-M0004C-1H-2,38-40	1.89	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	0	0	Total sample	no	0	0
1.99	302-M0004C-1H-2,48-50	1.99	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	0	0	Total sample	no	0	0
2.09	302-M0004C-1H-2,58-60	2.09	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	0	0	Total sample	no	0	0
2.19	302-M0004C-1H-2,68-70	2.19	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	0	0	Total sample	no	0	0
2.29	302-M0004C-1H-2,78-80	2.29	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	0	0	Aliquot	3 (1/8 obs)	0	0
2.39	302-M0004C-1H-2,88-90	2.39	1	0	0	0	0	1	1	0	0	0	1	50	0	0	0	0	1	Total sample	no	0	2
2.49	302-M0004C-1H-2,98-100	2.49	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	1	1	Total sample	no	0	1
2.59	302-M0004C-1H-2,108-110	2.59	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	0	0	Total sample	no	0	0
2.69	302-M0004C-1H-2,118-120	2.69	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	0	0	Aliquot	1 (1/2obs)	0	0
2.79	302-M0004C-1H-2,128-130	2.79	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	0	0	Total sample	no	0	0
2.89	302-M0004C-1H-2,138-140	2.89	1	0	0	0	0	1	1	0	0	0	1	50	0	0	0	0	1	Total sample	no	0	1
2.99	302-M0004C-1H-2,148-150	2.99	0	0	0	0	0	0	0	0	0	0	0	50	0	1	0	1	2	Total sample	no	0	2
3.10	302-M0004C-1H-3,8-10	3.10	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	0	0	Total sample	no	0	0
3.20	302-M0004C-1H-3,18-20	3.20	1	0	0	0	0	1	1	0	0	0	1	50	0	0	0	0	1	Total sample	no	0	1
3.30	302-M0004C-1H-3,28-30	3.30	0	0	0	0	0	?1	0	0	0	0	0	50	0	0	0	0	0	Total sample	no	0	0
3.40	302-M0004C-1H-3,38-40	3.40	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	0	0	Total sample	no	0	0
3.50	302-M0004C-1H-3,48-50	3.50	0	0	0	0	0	0	0	0	0	0	0	50	0	0	0	0	0	Aliquot	3 (1/8 obs)	0	0