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Pospichal, James J; Bralower, Timothy J (1992): Abundance of calcareous nannofossils in ODP Hole 122-761C (Table 1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.729258, Supplement to: Pospichal, JJ; Bralower, TJ (1992): Calcareous nannofossils across the Cretaceous/Tertiary boundary, Site 761, Northwest Australia margin. In: von Rad, U; Haq, BU; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 122, 735-751, https://doi.org/10.2973/odp.proc.sr.122.187.1992

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Published: 1992 (exact date unknown)DOI registered: 2009-12-15

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Abstract:
A biostratigraphically complete (all nannofossil biozones present) Cretaceous/Tertiary boundary was recovered at Site 761 on the Wombat Plateau, northwest Australian margin, during Ocean Drilling Program Leg 122. A quantitative study of calcareous nannofossils on closely spaced samples across the boundary reveals a rapid change in assemblages in a similar fashion to other Cretaceous/Tertiary boundary sites. Nannofossil species were placed into three categories: Tertiary, Cretaceous, and 'survivors'. The rapid sequential turnover in these assemblages is as follows: Cretaceous species are abruptly replaced at the boundary by opportunistic survivor species, which in turn are abruptly replaced by newly evolved Tertiary taxa. The uppermost Maestrichtian assemblage is distinctly mid-latitudinal with few Micula murus and rare to few Nephrolithus frequens. The nannofossil assemblage immediately above the boundary is dominated by an abundance bloom of Cyclagelosphaera spp. No Thoracosphaera or Braarudosphaera abundance blooms are present as at many other localities.
The change from a survivor- to Tertiary-dominated assemblage is coincident with the CPla/CPlb nannofossil subzonal boundary, which is marked by the simultaneous first occurrence of several species including Cruciplacolithus tenuis and C. primus. The latter is found to first occur below C. tenuis in the most complete Cretaceous/Tertiary sections. A hiatus between Subzones CPla and CPlb is interpreted to explain this discrepancy.
Project(s):
Coverage:
Latitude: -16.737000 * Longitude: 115.535000
Date/Time Start: 1988-07-21T09:00:00 * Date/Time End: 1988-07-25T02:00:00
Minimum Elevation: -2179.0 m * Maximum Elevation: -2179.0 m
Event(s):
122-761C * Latitude: -16.737000 * Longitude: 115.535000 * Date/Time Start: 1988-07-21T09:00:00 * Date/Time End: 1988-07-25T02:00:00 * Elevation: -2179.0 m * Penetration: 436.7 m * Recovery: 72.24 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg122 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 33 cores; 436.7 m cored; 0 m drilled; 16.5 % 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
Nannofossils, cretaceousNannos cretaceous#Pospichal, James JSmear slide analysis
Nannofossils, tertiaryNannos tertiary#Pospichal, James JSmear slide analysis
Nannofossils, survivorNannos survivor#Pospichal, James JSmear slide analysis
NannofossilsNannos#Pospichal, James JSmear slide analysistotal
Actinozygus regularisA. regularis#Pospichal, James JSmear slide analysisCretaceous
Arkhangelskiella cymbiformisA. cymbiformis#Pospichal, James JSmear slide analysisA. cymbiformis / A. specillata, Cretaceous
10 Bidiscus rotatoriusB. rotatorius#Pospichal, James JSmear slide analysisCretaceous
11 Biscutum sp.Biscutum sp.#Pospichal, James JSmear slide analysisvar. 1, Cretaceous
12 Biscutum sp.Biscutum sp.#Pospichal, James JSmear slide analysisvar. 2, Cretaceous
13 Chiastozygus amphiponsC. amphipons#Pospichal, James JSmear slide analysisCretaceous
14 Chiastozygus sp.Chiastozygus sp.#Pospichal, James JSmear slide analysisChiastozygus sp. aff. C. interruptus, Cretaceous
15 Chiastozygus spp.Chiastozygus spp.#Pospichal, James JSmear slide analysisgenus questionable, Cretaceous
16 Corollithion exiguumC. exiguum#Pospichal, James JSmear slide analysisCretaceous
17 Corollithion madagaskarensisC. madagaskarensis#Pospichal, James JSmear slide analysisgenus questionable, Cretaceous
18 Corollithion rhombicumC. rhombicum#Pospichal, James JSmear slide analysisCretaceous
19 Cretarhabdus conicusC. conicus#Pospichal, James JSmear slide analysisCretaceous
20 Cretarhabdus crenulatusC. crenulatus#Pospichal, James JSmear slide analysisCretaceous
21 Cretarhabdus surirellusC. surirellus#Pospichal, James JSmear slide analysisCretaceous
22 Cribrosphaerella daniaeC. daniae#Pospichal, James JSmear slide analysisCretaceous
23 Cribrosphaerella ehrenbergiiC. ehrenbergii#Pospichal, James JSmear slide analysisCretaceous
24 Cylindralithus spp.Cylindralithus spp.#Pospichal, James JSmear slide analysisCretaceous
25 Eiffellithus turriseiffeliiE. turriseiffelii#Pospichal, James JSmear slide analysisCretaceous
26 Kamptnerius magnificusK. magnificus#Pospichal, James JSmear slide analysisCretaceous
27 Lithraphidites quadratusL. quadratus#Pospichal, James JSmear slide analysisCretaceous
28 Lucianorhabdus cayeuxiiL. cayeuxii#Pospichal, James JSmear slide analysisCretaceous
29 Manivitella pemmatoideaM. pemmatoidea#Pospichal, James JSmear slide analysisCretaceous
30 Microrhabdulus decoratusM. decoratus#Pospichal, James JSmear slide analysisCretaceous
31 Micula decussataM. decussata#Pospichal, James JSmear slide analysisCretaceous
32 Micula murusM. murus#Pospichal, James JSmear slide analysisCretaceous
33 Nephrolithus frequensN. frequens#Pospichal, James JSmear slide analysisCretaceous
34 Nephrolithus frequens miniporusN. frequens miniporus#Pospichal, James JSmear slide analysisCretaceous
35 Prediscosphaera arkhangelskyiP. arkhangelskyi#Pospichal, James JSmear slide analysisCretaceous
36 Prediscosphaera cretaceaP. cretacea#Pospichal, James JSmear slide analysisCretaceous
37 Prediscosphaera grandisP. grandis#Pospichal, James JSmear slide analysisCretaceous
38 Prediscosphaera spinosaP. spinosa#Pospichal, James JSmear slide analysisCretaceous
39 Prediscosphaera stoveriP. stoveri#Pospichal, James JSmear slide analysisCretaceous
40 Tranolithus minimusT. minimus#Pospichal, James JSmear slide analysisCretaceous
41 Vagalapilla aachenaV. aachena#Pospichal, James JSmear slide analysisCretaceous
42 Watznaueria barnesaeW. barnesae#Pospichal, James JSmear slide analysisCretaceous
43 Zeugrhabdotus embergeriZ. embergeri#Pospichal, James JSmear slide analysisCretaceous
44 Zygodiscus spiralisZ. spiralis#Pospichal, James JSmear slide analysisCretaceous
45 Zygodiscus sp.Zygodiscus sp.#Pospichal, James JSmear slide analysisCretaceous
46 Biscutum castrorumB. castrorum#Pospichal, James JSmear slide analysissurvivors
47 Braarudosphaera bigelowiiB. bigelowii#Pospichal, James JSmear slide analysissurvivors
48 Cyclagelosphaera reinhardtiiC. reinhardtii#Pospichal, James JSmear slide analysisC. reinhardtii / C. alta, survivors
49 Lapideacassis sp.Lapideacassis sp.#Pospichal, James JSmear slide analysissurvivors
50 Markalius apertusM. apertus#Pospichal, James JSmear slide analysissurvivors
51 Markalius inversusM. inversus#Pospichal, James JSmear slide analysissurvivors
52 Neocrepidolithus spp.Neocrepidolithus spp.#Pospichal, James JSmear slide analysissurvivors
53 Neocrepidolithus fossusN. fossus#Pospichal, James JSmear slide analysissurvivors
54 Thoracosphaera spp.Thoracosphaera spp.#Pospichal, James JSmear slide analysissurvivors
55 Zygodiscus sigmoidesZ. sigmoides#Pospichal, James JSmear slide analysissurvivors
56 Biantholithus sparsusB. sparsus#Pospichal, James JSmear slide analysisTertiary
57 Chiasmolithus danicusC. danicus#Pospichal, James JSmear slide analysisTertiary
58 Coccolithus pelagicusC. pelagicus#Pospichal, James JSmear slide analysisC. pelagicus / C. cavus, Tertiary
59 Coccolithus subpertususC. subpertusus#Pospichal, James JSmear slide analysisTertiary
60 Coccolithus sp.Coccolithus sp.#Pospichal, James JSmear slide analysisTertiary
61 Cruciplacolithus primusC. primus#Pospichal, James JSmear slide analysislarge, Tertiary
62 Cruciplacolithus primusC. primus#Pospichal, James JSmear slide analysissmall, Tertiary
63 Cruciplacolithus tenuisC. tenuis#Pospichal, James JSmear slide analysisTertiary
64 Neochiastozygus sp.Neochiastozygus sp.#Pospichal, James JSmear slide analysisTertiary
65 Prinsius dimorphosusP. dimorphosus#Pospichal, James JSmear slide analysisTertiary
Size:
2274 data points

Data

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


Epoch

Nannos zone

Sample label
(DSDP/ODP/IODP sample designation)

Nannos cretaceous [#]
(Smear slide analysis)

Nannos tertiary [#]
(Smear slide analysis)

Nannos survivor [#]
(Smear slide analysis)

Nannos [#]
(total, Smear slide analysis)

A. regularis [#]
(Cretaceous, Smear slide analysis)

A. cymbiformis [#]
(A. cymbiformis / A. specillat...)
10 
B. rotatorius [#]
(Cretaceous, Smear slide analysis)
11 
Biscutum sp. [#]
(var. 1, Cretaceous, Smear sli...)
12 
Biscutum sp. [#]
(var. 2, Cretaceous, Smear sli...)
13 
C. amphipons [#]
(Cretaceous, Smear slide analysis)
14 
Chiastozygus sp. [#]
(Chiastozygus sp. aff. C. inte...)
15 
Chiastozygus spp. [#]
(genus questionable, Cretaceou...)
16 
C. exiguum [#]
(Cretaceous, Smear slide analysis)
17 
C. madagaskarensis [#]
(genus questionable, Cretaceou...)
18 
C. rhombicum [#]
(Cretaceous, Smear slide analysis)
19 
C. conicus [#]
(Cretaceous, Smear slide analysis)
20 
C. crenulatus [#]
(Cretaceous, Smear slide analysis)
21 
C. surirellus [#]
(Cretaceous, Smear slide analysis)
22 
C. daniae [#]
(Cretaceous, Smear slide analysis)
23 
C. ehrenbergii [#]
(Cretaceous, Smear slide analysis)
24 
Cylindralithus spp. [#]
(Cretaceous, Smear slide analysis)
25 
E. turriseiffelii [#]
(Cretaceous, Smear slide analysis)
26 
K. magnificus [#]
(Cretaceous, Smear slide analysis)
27 
L. quadratus [#]
(Cretaceous, Smear slide analysis)
28 
L. cayeuxii [#]
(Cretaceous, Smear slide analysis)
29 
M. pemmatoidea [#]
(Cretaceous, Smear slide analysis)
30 
M. decoratus [#]
(Cretaceous, Smear slide analysis)
31 
M. decussata [#]
(Cretaceous, Smear slide analysis)
32 
M. murus [#]
(Cretaceous, Smear slide analysis)
33 
N. frequens [#]
(Cretaceous, Smear slide analysis)
34 
N. frequens miniporus [#]
(Cretaceous, Smear slide analysis)
35 
P. arkhangelskyi [#]
(Cretaceous, Smear slide analysis)
36 
P. cretacea [#]
(Cretaceous, Smear slide analysis)
37 
P. grandis [#]
(Cretaceous, Smear slide analysis)
38 
P. spinosa [#]
(Cretaceous, Smear slide analysis)
39 
P. stoveri [#]
(Cretaceous, Smear slide analysis)
40 
T. minimus [#]
(Cretaceous, Smear slide analysis)
41 
V. aachena [#]
(Cretaceous, Smear slide analysis)
42 
W. barnesae [#]
(Cretaceous, Smear slide analysis)
43 
Z. embergeri [#]
(Cretaceous, Smear slide analysis)
44 
Z. spiralis [#]
(Cretaceous, Smear slide analysis)
45 
Zygodiscus sp. [#]
(Cretaceous, Smear slide analysis)
46 
B. castrorum [#]
(survivors, Smear slide analysis)
47 
B. bigelowii [#]
(survivors, Smear slide analysis)
48 
C. reinhardtii [#]
(C. reinhardtii / C. alta, sur...)
49 
Lapideacassis sp. [#]
(survivors, Smear slide analysis)
50 
M. apertus [#]
(survivors, Smear slide analysis)
51 
M. inversus [#]
(survivors, Smear slide analysis)
52 
Neocrepidolithus spp. [#]
(survivors, Smear slide analysis)
53 
N. fossus [#]
(survivors, Smear slide analysis)
54 
Thoracosphaera spp. [#]
(survivors, Smear slide analysis)
55 
Z. sigmoides [#]
(survivors, Smear slide analysis)
56 
B. sparsus [#]
(Tertiary, Smear slide analysis)
57 
C. danicus [#]
(Tertiary, Smear slide analysis)
58 
C. pelagicus [#]
(C. pelagicus / C. cavus, Tert...)
59 
C. subpertusus [#]
(Tertiary, Smear slide analysis)
60 
Coccolithus sp. [#]
(Tertiary, Smear slide analysis)
61 
C. primus [#]
(large, Tertiary, Smear slide ...)
62 
C. primus [#]
(small, Tertiary, Smear slide ...)
63 
C. tenuis [#]
(Tertiary, Smear slide analysis)
64 
Neochiastozygus sp. [#]
(Tertiary, Smear slide analysis)
65 
P. dimorphosus [#]
(Tertiary, Smear slide analysis)
PleistoceneCP1b122-761C-3R-3,102542192950251311061300015001171101130211210100602518013111211301705662858821000012101<10
PleistoceneCP1b122-761C-3R-3,132522623506412100601000203022109012014320400603222012708224017024628151043030067300
PleistoceneCP1b122-761C-3R-3,152264925200000000000010000000000010000000000000000000300122003024000221163
PleistoceneCP1b122-761C-3R-3,204364735130000000000010000000001010000000000010010100400228122482000351184
PleistoceneCP1b122-761C-3R-3,401364755120000000000000000000000000000000000100000000500328032840001152170
PleistoceneCP1b122-761C-3R-3,428334765171000000000020001100000020000100000000040100200026102733100190179
PleistoceneCP1b122-761C-3R-3,45832462502000000000000000100000002000030000020003000050022201262202119<1175
PleistoceneCP1b122-761C-3R-3,49649450505000000000002000001000001000000000020000010080013901292102169084
PleistoceneCP1b122-761C-3R-3,5195653660100000000000200020000000200003000000000100003101500010210217510363
PleistoceneCP1a122-761C-3R-3,53120360325120110002010001040018030201819110024107004030660117206732047232000000000
PleistoceneCP1a122-761C-3R-3,55163339750911100040100071111401021700424020041111001207056011203631403885000000002
PleistoceneCP1a122-761C-3R-3,57166338450861201040100082002303017004200000420060013130371113016611051044000000000
PleistoceneCP1a122-761C-3R-3,591753383516580001010001120016130110052322104722600190703801460261405823000000000
PleistoceneCP1a122-761C-3R-3,6217633725154101102000001310018250120141810004610800190813901540340502942000000000
PleistoceneCP1a122-761C-3R-3,63167337150531102030200011601280409016260100390040090104701760152704501000000000
PleistoceneCP1a122-761C-3R-3,641763333512260204020001610016350500215211054138002205037015301561302713000000000
PleistoceneCP1a122-761C-3R-3,651863221509161102200001320117071170043012004800612160412101591068703631000000000
PleistoceneCP1a122-761C-3R-3,661663351502410010500000910021130100041900104502900130803001970061702381000000000
MaestrichtianCC26122-761C-3R-3,67387119050681921072300031214241112280254820009408280444060230440034001170000000000
MaestrichtianCC26122-761C-3R-3,6844868051622723011120002331138311020001071630092214300580140170150014001210000000000
MaestrichtianCC26122-761C-3R-3,69458521511729220101400024400443100120176912101220525126505015015001400171000000000
MaestrichtianCC26122-761C-3R-3,70428750503725201904000312014611411500166320089492301581120170170024001160000000000
MaestrichtianCC26122-761C-3R-3,714784405228254501105011284014452312104758542010819431140090190801800260000000000
MaestrichtianCC26122-761C-3R-3,7348927051693238111050001950034314116008781200128483702460122100700700120000000000
MaestrichtianCC26122-761C-3R-3,7548714050163504060800020201436271280297161101223632043625000301300070000000000
MaestrichtianCC26122-761C-3R-3,79500170517152121009090113300251418223108633510113341802642130006001000100000000000
MaestrichtianCC26122-761C-3R-3,8049316050973501113020002210137513230007121410084216029004110400200090000000000
MaestrichtianCC26122-761C-3R-3,85500160516112911141211100020501492315350165824307827170381181004001000110000000000
MaestrichtianCC26122-761C-3R-3,9049911051013310162241500019301474170150495498517126270686012100400000070000000000
MaestrichtianCC26122-761C-3R-3,100494150509133732101445011160015252821304554711406337100598071005000000100000000000
MaestrichtianCC26122-761C-3R-3,110518240542102732721006000326033222401502563277190241914771340101001000210000000000
MaestrichtianCC26122-761C-3R-3,1204912205136171130701000025190244524315031077443087491402580250101000000200000000000
MaestrichtianCC26122-761C-3R-3,130492170509619210<11516<10030120<12342741910882362110925100<16601542020<13000100000000000
MaestrichtianCC26122-761C-3R-3,140527305301429223017180004013012633431501126638409109281646022100000100020000000000
MaestrichtianCC26122-761C-3R-3,14850640511227119014080102910012111621502197719407607250267037320200000000000000000