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Jones, Heather; Niederbockstruck, Bryan; Westerhold, Thomas; Röhl, Ursula (2025): Late Paleocene - early Eocene calcareous nannofossil relative abundance count data from IODP Site 378-U1553D (Campbell Plateau, SW Pacific Ocean) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.984405

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Published: 2025-09-05DOI registered: 2025-10-07

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Abstract:
In this dataset, we show the raw relative abundance count data for calcareous nannofossils observed in sediment samples from International Ocean Discovery Program (IODP) Expedition 378, Site U1553, Hole D, located on the Campbell Plateau in the high paleolatitude SW Pacific Ocean. 66 smear slides spanning the late Paleocene - early Eocene (ca. 55.7 to 56.5 Ma) - including the Paleocene-Eocene Thermal Maximum (PETM) and an apparent pre-cursor event - were examined under a polarising light microscope at 1000 to 1600x magnification. At least 300 nannofossil specimens were counted in each sample and identified to species-level whenever possible (genus-level when not), predominantly using the taxonomic concepts collated in the online database Nannotax. Due to the presence of non-classic forms and intermediate morphotypes of species belonging to the Toweius/Prinsius evolutionary lineage, our taxonomic concepts for these taxa differed slightly from those presented on Nannotax and are therefore detailed further in the 'Methods' section of the source text (Jones et al. 2025). Our genus-level relative abundance data were then used to document nannofossil assemblage change during the PETM and pre-cursor event using the previously-published age model and bulk sediment carbon isotope data in Niederbockstruck et al. (2024). After Hellinger data standardisation, the genus-level raw data were also used in a two-way cluster analysis and multiple Principal Components Analyses (PCA)'s to better visualise distinct paleoecological groups as Site U1553 and to compare our data to nannofossil assemblage data from other sites.
Keyword(s):
Assemblages; calcareous nannofossil; Campbell Plateau; coccolith abundances; coccolithophore; early Eocene; hyperthermal event; IODP 378; late Paleocene; Micropaleontology; Paleocene-Eocene Thermal Maximum (PETM); paleoecology; relative abundance; Scientific drilling; Site U1553; SW Pacific; Ypresian
Supplement to:
Jones, Heather; Niederbockstruck, Bryan; Westerhold, Thomas; Röhl, Ursula (2025): Palaeoecological change preceded the Palaeocene-Eocene Thermal Maximum by 200 kyr in the high latitude south-west Pacific Ocean. Communications Earth & Environment, 6, https://doi.org/10.1038/s43247-025-02749-5
Related to:
Niederbockstruck, Bryan; Jones, Heather; Yasukawa, K; Raffi, Isabella; Tanaka, E; Westerhold, Thomas; Ikehara, Minoru; Röhl, Ursula (2024): Late Paleocene to early Eocene stable isotope records and calcareous nannofossil datums at IODP Site U1553 [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.963554
References:
Niederbockstruck, Bryan; Jones, H L; Yasukawa, K; Raffi, Isabella; Tanaka, E; Westerhold, Thomas; Ikehara, Minoru; Röhl, Ursula (2024): Apparent Diachroneity of Calcareous Nannofossil Datums During the Early Eocene in the High-Latitude South Pacific Ocean. Paleoceanography and Paleoclimatology, 39(4), e2023PA004801, https://doi.org/10.1029/2023PA004801
Funding:
German Research Foundation (DFG), grant/award no. 390741603: EXC 2077: The Ocean Floor – Earth's Uncharted Interface
Coverage:
Latitude: -52.224000 * Longitude: 166.191300
Date/Time Start: 2020-01-21T14:30:00 * Date/Time End: 2020-01-24T12:55:00
Minimum DEPTH, sediment/rock: 446.405 m * Maximum DEPTH, sediment/rock: 453.205 m
Event(s):
378-U1553D * Latitude: -52.224000 * Longitude: 166.191300 * Date/Time Start: 2020-01-21T14:30:00 * Date/Time End: 2020-01-24T12:55:00 * Elevation: -1221.6 m * Location: South Pacific Ocean * Campaign: EXP378 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: Time on hole (days): 2.93, Seafloor depth DRF (m): 1233, Seafloor depth est. method: OFFSET, Rig floor to sea level (m): 11.39, Penetration DSF (m): 584.3, Cored interval (m): 184.9, Recovered length (m): 97.95, Recovery (%): 52.97, Drilled interval (m): 399.4, Drilled interval (no.): 1, Total cores (no.): 19, RCB cores (no.): 19
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
Sample code/labelSample labelJones, Heather
Cruise/expeditionExpeditionJones, Heather
SiteSiteJones, Heather
HoleHJones, Heather
CoreCoreJones, Heather
SectionSectJones, Heather
OffsetOffsetcmJones, HeatherTop
OffsetOffsetcmJones, HeatherBottom
DEPTH, sediment/rockDepth sedmJones, HeatherGeocode – Depth CSF-A (mbsf)
10 Depth, composite revised, adjustedDepth adj rmcdarmcdJones, HeatherDepth CCSF-A adj. (rmcd)
11 AGEAgeka BPJones, HeatherGeocode
12 AgeAgeMaJones, Heather
13 Cyclicargolithus parvusC. parvus#Jones, HeatherCounting
14 Hornibrookina spp.Hornibrookina spp.#Jones, HeatherCounting
15 Prinsius martiniiP. martinii#Jones, HeatherCounting
16 Prinsius bisulcusP. bisulcus#Jones, HeatherCountingPrinsius bisulcus s.s
17 Prinsius bisulcusP. bisulcus#Jones, HeatherCounting? (wide)
18 Prinsius bisulcusP. bisulcus#Jones, HeatherCounting? (with pores)
19 Toweius spp., smallToweius spp. s#Jones, HeatherCountingcf. rotundus/small T. pertusus
20 Toweius pertususT. pertusus#Jones, HeatherCounting
21 Toweius callosusT. callosus#Jones, HeatherCounting
22 Toweius patellusT. patellus#Jones, HeatherCounting
23 Toweius eminensT. eminens#Jones, HeatherCounting
24 Toweius tovaeT. tovae#Jones, HeatherCounting
25 Toweius serotinusT. serotinus#Jones, HeatherCounting
26 Toweius occultatusT. occultatus#Jones, HeatherCounting
27 Toweius spp.Toweius spp.#Jones, HeatherCounting
28 Coccolithus pelagicusC. pelagicus#Jones, HeatherCounting
29 Coccolithus cf. pauxillusC. cf. pauxillus#Jones, HeatherCounting
30 Coccolithus cf. bowniiC. cf. bownii#Jones, HeatherCounting
31 Campylosphaera delaC. dela#Jones, HeatherCounting
32 Chiasmolithus bidensC. bidens#Jones, HeatherCounting
33 Chiasmolithus solitusC. solitus#Jones, HeatherCounting
34 Chiasmolithus consuetusC. consuetus#Jones, HeatherCounting
35 Chiasmolithus nitidusC. nitidus#Jones, HeatherCounting
36 Chiasmolithus spp.Chiasmolithus spp.#Jones, HeatherCounting
37 Cruciplacolithus spp.Cruciplacolithus spp.#Jones, HeatherCounting
38 Clausicoccus fenestratusC. fenestratus#Jones, HeatherCounting
39 Craticullithus cassusC. cassus#Jones, HeatherCounting
40 Fasciculithus clinatusF. clinatus#Jones, HeatherCounting
41 Fasciculithus involutusF. involutus#Jones, HeatherCounting
42 Fasciculithus tympaniformisF. tympaniformis#Jones, HeatherCounting
43 Fasciculithus indeterminataFasciculithus indet#Jones, HeatherCountingFasciculithus top view
44 Zygrhablithus bijugatusZ. bijugatus#Jones, HeatherCounting
45 Sphenolithus moriformisS. moriformis#Jones, HeatherCountingSphenolithus moriformis/primus
46 Discoaster lenticularisD. lenticularis#Jones, HeatherCounting
47 Discoaster mohleriD. mohleri#Jones, HeatherCounting
48 Discoaster multiradiatusD. multiradiatus#Jones, HeatherCounting
49 Discoaster salisburgensisD. salisburgensis#Jones, HeatherCounting
50 Discoaster spp.Discoaster spp.#Jones, HeatherCounting
51 Braarudosphaera spp.Braarudosphaera spp.#Jones, HeatherCounting
52 Micrantholithus spp.Micrantholithus spp.#Jones, HeatherCounting
53 Calcidiscus pacificanusC. pacificanus#Jones, HeatherCounting
54 Calcidiscus parvicrucisC. parvicrucis#Jones, HeatherCounting
55 Umbilicosphaera sp.Umbilicosphaera sp.#Jones, HeatherCounting
56 Pontosphaera spp.Pontosphaera spp.#Jones, HeatherCounting
57 Neochiastozygus distentusN. distentus#Jones, HeatherCounting
58 Neochiastozygus digitosusN. digitosus#Jones, HeatherCounting
59 Neochiastozygus junctusN. junctus#Jones, HeatherCounting
60 Neochiastozygus rosenkrantziiN. rosenkrantzii#Jones, HeatherCounting
61 Neochiastozygus spp.Neochiastozygus spp.#Jones, HeatherCounting
62 Neococcolithes protenusN. protenus#Jones, HeatherCounting
63 Ellipsolithus bolliiE. bollii#Jones, HeatherCounting
64 Biantholithus spp.Biantholithus spp.#Jones, HeatherCounting
65 Biscutum braloweriB. braloweri#Jones, HeatherCounting
66 Biscutum harrisoniiB. harrisonii#Jones, HeatherCounting
67 Zeugrhabdotus sigmoidesZ. sigmoides#Jones, HeatherCounting
68 Markalius apertusM. apertus#Jones, HeatherCounting
69 Markalius inversusM. inversus#Jones, HeatherCounting
70 Markalius latusM. latus#Jones, HeatherCounting
71 Holococcolith spp.Holococcolith spp.#Jones, HeatherCounting
72 Nannofossils, otherNannos oth#Jones, HeatherCounting
73 CalcispheresCalcispheres#Jones, HeatherCountingNon-nanno (Calcisphere fragments)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
4686 data points

Data

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


Sample label

Expedition

Site

H

Core

Sect

Offset [cm]
(Top)

Offset [cm]
(Bottom)

Depth sed [m]
(Depth CSF-A (mbsf))
10 
Depth adj rmcd [armcd]
(Depth CCSF-A adj. (rmcd))
11 
Age [ka BP]
12 
Age [Ma]
13 
C. parvus [#]
14 
Hornibrookina spp. [#]
15 
P. martinii [#]
16 
P. bisulcus [#]
(Prinsius bisulcus s.s)
17 
P. bisulcus [#]
(? (wide))
18 
P. bisulcus [#]
(? (with pores))
19 
Toweius spp. s [#]
(cf. rotundus/small T. pertusus)
20 
T. pertusus [#]
21 
T. callosus [#]
22 
T. patellus [#]
23 
T. eminens [#]
24 
T. tovae [#]
25 
T. serotinus [#]
26 
T. occultatus [#]
27 
Toweius spp. [#]
28 
C. pelagicus [#]
29 
C. cf. pauxillus [#]
30 
C. cf. bownii [#]
31 
C. dela [#]
32 
C. bidens [#]
33 
C. solitus [#]
34 
C. consuetus [#]
35 
C. nitidus [#]
36 
Chiasmolithus spp. [#]
37 
Cruciplacolithus spp. [#]
38 
C. fenestratus [#]
39 
C. cassus [#]
40 
F. clinatus [#]
41 
F. involutus [#]
42 
F. tympaniformis [#]
43 
Fasciculithus indet [#]
(Fasciculithus top view)
44 
Z. bijugatus [#]
45 
S. moriformis [#]
(Sphenolithus moriformis/primus)
46 
D. lenticularis [#]
47 
D. mohleri [#]
48 
D. multiradiatus [#]
49 
D. salisburgensis [#]
50 
Discoaster spp. [#]
51 
Braarudosphaera spp. [#]
52 
Micrantholithus spp. [#]
53 
C. pacificanus [#]
54 
C. parvicrucis [#]
55 
Umbilicosphaera sp. [#]
56 
Pontosphaera spp. [#]
57 
N. distentus [#]
58 
N. digitosus [#]
59 
N. junctus [#]
60 
N. rosenkrantzii [#]
61 
Neochiastozygus spp. [#]
62 
N. protenus [#]
63 
E. bollii [#]
64 
Biantholithus spp. [#]
65 
B. braloweri [#]
66 
B. harrisonii [#]
67 
Z. sigmoides [#]
68 
M. apertus [#]
69 
M. inversus [#]
70 
M. latus [#]
71 
Holococcolith spp. [#]
72 
Nannos oth [#]
73 
Calcispheres [#]
(Non-nanno (Calcisphere fragme...)
378-U1553D-6-6,74-75378U1553D667475446.405478.9250055665.6955.665690081424320019133390010002300030030001000031300000001100000003000001000217
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378-U1553D-7-1,119-120378U1553D71119120449.295481.9250055856.5455.856543242311511349130031701129010202200000515142161559700000020001030000001003
378-U1553D-7-1,125-126378U1553D71125126449.355481.9850055870.9055.87090145292891232927033600043000300000010611201145451810110100010200000111003
378-U1553D-7-2,2-3378U1553D7223449.425482.0550055894.8255.89482463473612229406211051112030010702200010226154828170221110000010110001000013
378-U1553D-7-2,5-6378U1553D7256449.450482.0800055903.9455.90394303344326010454814014150104403220120000042514581431110000010000003000000034
378-U1553D-7-2,10-11378U1553D721011449.405482.1350055887.6555.887645534637660235610012380005200020001300069133652464210000010000101001011006
378-U1553D-7-2,15-16378U1553D721516449.555482.1850055913.0655.91305586352819004372150171511039031402230011023113521100221000000000010010010015
378-U1553D-7-2,20-21378U1553D722021449.605482.2350055922.1755.9221741726342200388217013711043020203301010112113322130001000010010000000000111
378-U1553D-7-2,25-26378U1553D722526449.665482.2950055931.2955.9312851905155006813426061700015000513100000212511600127000000020001000000000004
378-U1553D-7-2,30-31378U1553D723031449.705482.3350055941.3755.941373250111500361622407170011600000400000021245740107000002000001000000000007
378-U1553D-7-2,35-36378U1553D723536449.750482.3800055951.4755.95146743191930036113901740041400042100000021015148411301000200001001100000000003
378-U1553D-7-2,40-41378U1553D724041449.805482.4350055961.5655.96155556173452023129140220000370008411300002212034162800200000001000014003003
378-U1553D-7-2,50-51378U1553D725051449.905482.5350055981.7455.981735850218440161721601230003300010106100001421553030500100000010000020200026
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