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Pospichal, James J (1991): Abundance of calcareous nannofossils in ODP Hole 121-752B (Table 1). PANGAEA, https://doi.org/10.1594/PANGAEA.729024, Supplement to: Pospichal, JJ (1991): Calcareous nannofossils across Cretaceous/Tertiary boundary at Site 752, eastern Indian Ocean. In: Weissel, J; Peirce, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 121, 395-413, https://doi.org/10.2973/odp.proc.sr.121.148.1991

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Abstract:
A biostratigraphically complete Cretaceous/Tertiary boundary was recovered during Ocean Drilling Program Leg 121. The boundary, cored in ODP Hole 752B on Broken Ridge, is the most expanded deep-sea section yet recovered by ODP/DSDP. The initial Danian subzone, CP la, spans nearly 5 m and the underlying uppermost Maestrichtian Nephrolithus frequens Zone extends 50 m below the boundary. The paleolatitude of Broken Ridge at Cretaceous/Tertiary time is estimated at 50°-55°S which includes this site among the latest in a series of complete or near complete high southern latitude Cretaceous/Tertiary boundary sections recovered by ODP (Leg 113 Site 690 and Leg 119 Site 738).
The boundary at Site 752 lies at the base of a thick (6-6.5 m) volcanic ash unit composed of multiple ash layers which overlies indurated Maestrichtian chalks. Magnetostratigraphy indicates that the boundary lies within Subchron 29R, which is the case for all other known complete sections for which the polarity has been determined. Anomalous abundances of the trace element iridium are present at the boundary. A second iridium peak, 80 cm above the boundary, corresponds to an increase in redeposited Cretaceous nannofossils.
The nannofossil succession is similar to that found at previously studied austral high-latitude ODP drill sites with few differences due to the more northerly location of this site. Individual nannofossil species were counted and placed into three categories. A plot of the percent abundance of Cretaceous, Tertiary, and 'survivor' groups illustrates the rapid replacement of the Cretaceous nannoflora by 'survivor' forms beginning at the boundary and the dominance of this latter group through the initial Danian biozone. This 'survivor' or opportunistic assemblage is then rapidly replaced by newly evolved Tertiary taxa. The assemblage of the uppermost Maestrichtian is biased toward dissolution-resistant forms such as Micula decussata. In those few intervals where preservation is good, the dissolution susceptible species, Prediscosphaera stoveri, is more prevalent and overall diversity of the assemblage is higher. The 'survivor' assemblage is dominated by Zygodiscus sigmoides and Thoracosphaera. The Tertiary assemblage consists of rare Biantholithus sparsus, the first of this group to appear. It is followed several meters upsection by Cruciplacolithus primus. Cruciplacolithus tenuis and small Prinsius spp. dominate the assemblage beginning at about 5 m above the boundary.
Project(s):
Coverage:
Latitude: -30.891000 * Longitude: 93.577500
Date/Time Start: 1988-05-18T09:00:00 * Date/Time End: 1988-05-22T12:30:00
Minimum DEPTH, sediment/rock: 349.02 m * Maximum DEPTH, sediment/rock: 373.05 m
Event(s):
121-752B * Latitude: -30.891000 * Longitude: 93.577500 * Date/Time Start: 1988-05-18T09:00:00 * Date/Time End: 1988-05-22T12:30:00 * Elevation: -1097.0 m * Penetration: 435.6 m * Recovery: 112.34 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg121 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 17 cores; 158 m cored; 0 m drilled; 71.1 % recovery
Comment:
<1 = present but not within 500 count
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
EpochEpochPospichal, James J
Nannofossil zoneNannos zonePospichal, James J
Sample code/labelSample labelPospichal, James JDSDP/ODP/IODP sample designation
DEPTH, sediment/rockDepth sedmGeocode
Nannofossils preservationNannos preservPospichal, James JSmear slide analysisG = good, M = moderate, P = poor
Nannofossils indeterminataNannos indetPospichal, James JSmear slide analysisV = very abundant (>10 specimens per field of view at 1560 X), A = abundant (6-10 specimens per field), C = common (1-5 specimen per field), F = few (one specimen per 2-10 fields), R = rare (one specimen per >10 fields of view)
Nannofossils, tertiaryNannos tertiary#Pospichal, James JSmear slide analysis
Nannofossils, cretaceousNannos cretaceous#Pospichal, James JSmear slide analysis
Nannofossils, survivorNannos survivor#Pospichal, James JSmear slide analysis
10 NannofossilsNannos#Pospichal, James JSmear slide analysistotal
11 Acuturris scotusA. scotus#Pospichal, James JSmear slide analysis
12 Ahmuellerella octoradiataA. octoradiata#Pospichal, James JSmear slide analysis
13 Arkhangelskiella cymbiformisA. cymbiformis#Pospichal, James JSmear slide analysis
14 Bidiscus rotatoriusB. rotatorius#Pospichal, James JSmear slide analysis
15 Biscutum constansB. constans#Pospichal, James JSmear slide analysis
16 Chiastozygus amphiponsC. amphipons#Pospichal, James JSmear slide analysis
17 Chiastozygus sp.Chiastozygus sp.#Pospichal, James JSmear slide analysis
18 Corollithion rhombicumC. rhombicum#Pospichal, James JSmear slide analysis
19 Cretarhabdus conicusC. conicus#Pospichal, James JSmear slide analysis
20 Cribrosphaerella daniaeC. daniae#Pospichal, James JSmear slide analysis
21 Cribrosphaerella ehrenbergiiC. ehrenbergii#Pospichal, James JSmear slide analysis
22 Eiffellithus turriseiffeliiE. turriseiffelii#Pospichal, James JSmear slide analysis
23 Eiffellithus sp.Eiffellithus sp.#Pospichal, James JSmear slide analysis
24 Gartnerago spp.Gartnerago spp.#Pospichal, James JSmear slide analysis
25 Kamptnerius magnificusK. magnificus#Pospichal, James JSmear slide analysis
26 Lithraphidites quadratusL. quadratus#Pospichal, James JSmear slide analysis
27 Micula decussataM. decussata#Pospichal, James JSmear slide analysis
28 Nephrolithus frequens frequensN. frequens frequens#Pospichal, James JSmear slide analysis
29 Nephrolithus frequens miniporusN. frequens miniporus#Pospichal, James JSmear slide analysis
30 Prediscosphaera cretaceaP. cretacea#Pospichal, James JSmear slide analysis
31 Prediscosphaera spinosaP. spinosa#Pospichal, James JSmear slide analysis
32 Prediscosphaera stoveriP. stoveri#Pospichal, James JSmear slide analysis
33 Watznaueria barnesaeW. barnesae#Pospichal, James JSmear slide analysis
34 Zygodiscus spiralisZ. spiralis#Pospichal, James JSmear slide analysis
35 Biscutum notaculumB. notaculum#Pospichal, James JSmear slide analysisreworked
36 Nephrolithus corystusN. corystus#Pospichal, James JSmear slide analysisreworked
37 Phanulithus obscurusP. obscurus#Pospichal, James JSmear slide analysisreworked
38 Reinhardtites levisR. levis#Pospichal, James JSmear slide analysisreworked
39 Tranolithus phacelosusT. phacelosus#Pospichal, James JSmear slide analysisreworked
40 Zygodiscus compactusZ. compactus#Pospichal, James JSmear slide analysisreworked
41 Zygodiscus diplogrammusZ. diplogrammus#Pospichal, James JSmear slide analysisreworked
42 Biscutum castrorumB. castrorum#Pospichal, James JSmear slide analysis
43 Braarudosphaera bigelowiiB. bigelowii#Pospichal, James JSmear slide analysis
44 Cyclagelosphaera reinhardtiiC. reinhardtii#Pospichal, James JSmear slide analysisC. reinhardtii/ C. alta
45 Lapidaecassis sp.Lapidaecassis sp.#Pospichal, James JSmear slide analysis
46 Markalius apertusM. apertus#Pospichal, James JSmear slide analysis
47 Markalius inversusM. inversus#Pospichal, James JSmear slide analysis
48 Neocrepidolithus cruciatusN. cruciatus#Pospichal, James JSmear slide analysis
49 Neocrepidolithus fossusN. fossus#Pospichal, James JSmear slide analysis
50 Neocrepidolithus neocrassusN. neocrassus#Pospichal, James JSmear slide analysis
51 Thoracosphaera spp.Thoracosphaera spp.#Pospichal, James JSmear slide analysis
52 Zygodiscus sigmoidesZ. sigmoides#Pospichal, James JSmear slide analysis
53 Zygolithus cruxZ. crux#Pospichal, James JSmear slide analysis
54 Zygolithus sp.Zygolithus sp.#Pospichal, James JSmear slide analysisrotated cross
55 Biantholithus sparsusB. sparsus#Pospichal, James JSmear slide analysis
56 Coccolithus cavusC. cavus#Pospichal, James JSmear slide analysisC. cavus / C. pelagicus
57 Cruciplacolithus primusC. primus#Pospichal, James JSmear slide analysis<5 µm
58 Cruciplacolithus primusC. primus#Pospichal, James JSmear slide analysis>5 µm
59 Cruciplacolithus tenuisC. tenuis#Pospichal, James JSmear slide analysis>7 µm
60 Prinsius tenuiculumP. tenuiculum#Pospichal, James JSmear slide analysisP. tenuiculum / P. dimorphosus
61 Futyania petalosaF. petalosa#Pospichal, James JSmear slide analysis
62 Placoliths, smallPlacoliths small#Pospichal, James JSmear slide analysisMiscellaneous small oval placoliths
Size:
4087 data points

Data

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


Epoch

Nannos zone

Sample label
(DSDP/ODP/IODP sample designation)

Depth sed [m]

Nannos preserv
(G = good, M = moderate, P = p...)

Nannos indet
(V = very abundant (>10 specim...)

Nannos tertiary [#]
(Smear slide analysis)

Nannos cretaceous [#]
(Smear slide analysis)

Nannos survivor [#]
(Smear slide analysis)
10 
Nannos [#]
(total, Smear slide analysis)
11 
A. scotus [#]
(Smear slide analysis)
12 
A. octoradiata [#]
(Smear slide analysis)
13 
A. cymbiformis [#]
(Smear slide analysis)
14 
B. rotatorius [#]
(Smear slide analysis)
15 
B. constans [#]
(Smear slide analysis)
16 
C. amphipons [#]
(Smear slide analysis)
17 
Chiastozygus sp. [#]
(Smear slide analysis)
18 
C. rhombicum [#]
(Smear slide analysis)
19 
C. conicus [#]
(Smear slide analysis)
20 
C. daniae [#]
(Smear slide analysis)
21 
C. ehrenbergii [#]
(Smear slide analysis)
22 
E. turriseiffelii [#]
(Smear slide analysis)
23 
Eiffellithus sp. [#]
(Smear slide analysis)
24 
Gartnerago spp. [#]
(Smear slide analysis)
25 
K. magnificus [#]
(Smear slide analysis)
26 
L. quadratus [#]
(Smear slide analysis)
27 
M. decussata [#]
(Smear slide analysis)
28 
N. frequens frequens [#]
(Smear slide analysis)
29 
N. frequens miniporus [#]
(Smear slide analysis)
30 
P. cretacea [#]
(Smear slide analysis)
31 
P. spinosa [#]
(Smear slide analysis)
32 
P. stoveri [#]
(Smear slide analysis)
33 
W. barnesae [#]
(Smear slide analysis)
34 
Z. spiralis [#]
(Smear slide analysis)
35 
B. notaculum [#]
(reworked, Smear slide analysis)
36 
N. corystus [#]
(reworked, Smear slide analysis)
37 
P. obscurus [#]
(reworked, Smear slide analysis)
38 
R. levis [#]
(reworked, Smear slide analysis)
39 
T. phacelosus [#]
(reworked, Smear slide analysis)
40 
Z. compactus [#]
(reworked, Smear slide analysis)
41 
Z. diplogrammus [#]
(reworked, Smear slide analysis)
42 
B. castrorum [#]
(Smear slide analysis)
43 
B. bigelowii [#]
(Smear slide analysis)
44 
C. reinhardtii [#]
(C. reinhardtii/ C. alta, Smea...)
45 
Lapidaecassis sp. [#]
(Smear slide analysis)
46 
M. apertus [#]
(Smear slide analysis)
47 
M. inversus [#]
(Smear slide analysis)
48 
N. cruciatus [#]
(Smear slide analysis)
49 
N. fossus [#]
(Smear slide analysis)
50 
N. neocrassus [#]
(Smear slide analysis)
51 
Thoracosphaera spp. [#]
(Smear slide analysis)
52 
Z. sigmoides [#]
(Smear slide analysis)
53 
Z. crux [#]
(Smear slide analysis)
54 
Zygolithus sp. [#]
(rotated cross, Smear slide an...)
55 
B. sparsus [#]
(Smear slide analysis)
56 
C. cavus [#]
(C. cavus / C. pelagicus, Smea...)
57 
C. primus [#]
(<5 µm, Smear slide analysis)
58 
C. primus [#]
(>5 µm, Smear slide analysis)
59 
C. tenuis [#]
(>7 µm, Smear slide analysis)
60 
P. tenuiculum [#]
(P. tenuiculum / P. dimorphosu...)
61 
F. petalosa [#]
(Smear slide analysis)
62 
Placoliths small [#]
(Miscellaneous small oval plac...)
PaleoceneCP1b121-752B-10R-3,92-93349.02MV2960183140000000000000000000000000000000000001010214000491125218200
PaleoceneCP1b121-752B-10R-3,145-146349.55MV301112314000000000000000010000000000000010000100001000035135720500
PaleoceneCP1b121-752B-10R-4,95-96350.55GV301093400000000000000000000000000000000000000000180002101828200
PaleoceneCP1b121-752B-10R-4,144-145351.04MC2742313070000000000000000000000000000000200000000227000270012612100
PaleoceneCP1b121-752B-10R-5,1-2351.11MC267435306100000000000002000000000010000020000000023100019121489700
PaleoceneCP1b121-752B-10R-5,33-34351.42MC44435850500000000000000003000000000000009000002001460004421217820701
PaleoceneCP1b121-752B-10R-5,89-90351.99MA47932851000000000000001002000000000000004000001001220002062611231401
PaleoceneCP1b121-752B-10R-5,143-144352.53GA427111254000000000000000000000001000000002300006201055700005419200143110
PaleoceneCP1b121-752B-10R-6,32-33352.92GA322119551800000000000000000000000000010002401051031818107010124251779104
PaleoceneCP1b121-752B-10R-6,86-87353.46MC1485356504100000000001001010000000000100044000128170026240000020140402
PaleoceneCP1b121-752B-10R-6,135-136353.95MC8214735021040000002100120500004100000000380001423500403170000313001
PaleoceneCP1a121-752B-10R-7,17-18354.27MC513489507100000000101003020001000010300018010027700413951000130001
PaleoceneCP1a121-752B-10R-7,59-60354.69GC1134855010000000000100100410221000001000600002532001622870010000000
PaleoceneCP1a121-752B-10R-CC354.80GC1124895020010000000000020510100100200000210101112600493800000000001
PaleoceneCP1a121-752B-11R-1,20-21355.00GF5294695030020011004120030230105200001000310003553205722627209000005
PaleoceneCP1a121-752B-11R-1,98-99355.78MF1344705050020010010020030114030213000100029000359510151361715100100000
PaleoceneCP1a121-752B-11R-1,140-141356.20MF05344850121900100172020701031101410000000300302462301702647200000000
PaleoceneCP1a121-752B-11R-2,20-21356.50GC1304674980140001021000020541104200001010250225413102602991110000000
PaleoceneCP1a121-752B-11R-2,70-71357.00GF01953095042625001010414010118037247612474000120029114011931020111821000000000
PaleoceneCP1a121-752B-11R-2,92-93357.22MC115035150213250021046712050372727214040000000240200141500422513010000000
PaleoceneCP1a121-752B-11R-2,110-111357.40MC03091904990104700165031727313205648103036390001000900008380532962000000000
PaleoceneCP1a121-752B-11R-2,129-130357.59MC31883115020927007003512222103144411015130000000300211141502791661000000003
PaleoceneCP1a121-752B-11R-2,144-145357.74MC51113875030123006102712009018181111234000100025020036300183020100000005
PaleoceneCP1a121-752B-11R-3,0-1357.80MF0134373507091200940272000501523260350000011109000122011032503200000000
PaleoceneCP1a121-752B-11R-3,10-11357.90MF243911155222937002419112402689250377619160556130001020402005300157011100000002
PaleoceneCP1a121-752B-11R-3,12-13357.92MF0463375001265910377053103323507176201304741900010011010043002233000000000
PaleoceneCP1a121-752B-11R-3,19-20357.99MC3604395021210000000300022051323014030000000270300317028226027010000002
PaleoceneCP1a121-752B-11R-3,30-31358.10MC0434606031250020012110040510110700000000044000248900962583000000000
PaleoceneCP1a121-752B-11R-3,39-40358.19GC26144050315700220271100404130207100000101900000556000152146010000001
PaleoceneCP1a121-752B-11R-3,44-45358.24PR04949800100000100000000110000000000002000004001811000000000
PaleoceneCP1a121-752B-11R-3,48-49358.28MF0514535040260010025000040680501200000000047011020400403400000000000
PaleoceneCP1a121-752B-11R-3,52-53358.32MF0214855060070000002000020041302000000000291100141200593690000000000
PaleoceneCP1a121-752B-11R-3,56-57358.36PR01685101002001000000002043020010000001012100054006570000000000
PaleoceneCP1a121-752B-11R-3,60-61358.40MC04745650301100010033100120312030601000000091040027502342930000000000
PaleoceneCP1a121-752B-11R-3,64-65358.44MC031724456101235002040719300239039717724244000000038340022602201490000000000
PaleoceneCP1a121-752B-11R-3,68-69358.48MC027821849641334001040621130132014667804608000000037050012400351250000000000
PaleoceneCP1a121-752B-11R-3,70-71358.50MC031820352101051001120612410221022904906336000100031060016000151350000000000
PaleoceneCP1a121-752B-11R-3,72-73358.52PC<12912255161461008001251100300723951501908000001065060040201228900<10000000
PaleoceneCP1a121-752B-11R-3,73-74358.53MF028621650208430032012212111140237166061110000000025030010001381390000000000
PaleoceneCP1a121-752B-11R-3,75-76358.55PR0260240500024600400517210331077452120110200000003030014000461740000000000
PaleoceneCP1a121-752B-11R-3,76-77358.55PR032174901700000040000205110101000000000000000000890000000000
PaleoceneCP1a121-752B-11R-3,80-81358.60PR01340000000000010000000000000000000000000000210000000000
PaleoceneCP1a121-752B-11R-3,82-83358.61PC04753951441076001020132424215909370527054415000000011000030004210000000000
PaleoceneCP1a121-752B-11R-3,84-85358.64PR041950102500100130000501370202000000000300000000150000000000
PaleoceneCP1a121-752B-11R-3,88-89358.67PR01421610050000010000010510001000000000000000000020000000000
PaleoceneCP1a121-752B-11R-3,91-92358.71MC048431515136310116909156263390378314120152210000000010000010009110000000000
PaleoceneCP1a121-752B-11R-3,92-93358.72MC04862851411181001220151313022601437112505551900000001100003000860000000000
MaestrichtianCribrosphaerella daniae121-752B-11R-3,101-102358.80PA0495750279740017108110403410149903190404150000000400000000300000000000
MaestrichtianCribrosphaerella daniae121-752B-11R-3,110-111358.90PA0503050319780013008120302420173924140307150000000000000000000000000000
MaestrichtianCribrosphaerella daniae121-752B-11R-3,120-121359.00PA051515163148500200010101100410189824240183100000000000100000000000000000
MaestrichtianCribrosphaerella daniae121-752B-11R-3,130-131359.10PA0509050911375005009192313450184756150334160000000000000000000000000000
MaestrichtianCribrosphaerella daniae121-752B-11R-3,140-141359.20PC0508050816630014003132711510195952140242140000000000000000000000000000
MaestrichtianCribrosphaerella daniae121-752B-11R-4,10-11359.40PC05111512364600400525141047027343618018380000000000000001000000000000
MaestrichtianCribrosphaerella daniae121-752B-11R-4,35-36359.65PA0504050434560090010164600450223427160484110000000000000000000000000000
MaestrichtianCribrosphaerella daniae121-752B-11R-CC364.40PC0506050601430010031511004603601811101400000000000000000000000000000
MaestrichtianCribrosphaerella daniae121-752B-12R-1,40-41364.80PA0505150633460013707434453770338223100941470000000000001000000000000000
MaestrichtianCribrosphaerella daniae121-752B-12R-1,116-117365.56PC0505150640620031014024129201135412311341470000000000001000000000000000
MaestrichtianCribrosphaerella daniae121-752B-12R-2,40-41366.30PA0504050442390214607262215910825916300770380000010000000000000000000000
MaestrichtianCribrosphaerella daniae121-752B-12R-2,115-116367.05PA05010501104940941033435251080444410291700210000000000000000000000000000
MaestrichtianCribrosphaerella daniae121-752B-12R-3,41-42367.81PA049915003141011004378823129<166461248077271002000000001000000000000000
MaestrichtianCribrosphaerella daniae121-752B-12R-3,115-116368.55PA05053508163131002001295121214108123637010310010000000003000000000000000
MaestrichtianCribrosphaerella daniae121-752B-12R-4,41-42369.31PA050505053298015005305834760987214260370150003000000000000000000000000
MaestrichtianCribrosphaerella daniae121-752B-12R-4,115-116370.05PA050205020047000007281300101023733122209100001000000000000000000000000
MaestrichtianCribrosphaerella daniae121-752B-12R-5,41-42370.81PA05080508004800100015260150411201065250212320150000000000000000000000000000
MaestrichtianCribrosphaerella daniae121-752B-12R-5,114-115371.54PA050715080041007006193500770220442314042060000000000000000010000000000
MaestrichtianCribrosphaerella daniae121-752B-12R-6,41-42372.31PA05090509054200150032221003630949445271703100000000000000000000000000000
MaestrichtianCribrosphaerella daniae121-752B-12R-6,115-116373.05PA050505051201110070082045111340892912341102240001000000000000000000000000