Paleocene to middle Eocene calcareous nannofossils of Maude Rise, Weddell Sea


Autoria(s): Pospichal, James J; Wise, Sherwood W
Cobertura

MEDIAN LATITUDE: -64.903200 * MEDIAN LONGITUDE: 1.962880 * SOUTH-BOUND LATITUDE: -65.161000 * WEST-BOUND LONGITUDE: 1.204800 * NORTH-BOUND LATITUDE: -64.517000 * EAST-BOUND LONGITUDE: 3.099900 * DATE/TIME START: 1987-01-16T08:00:00 * DATE/TIME END: 1987-01-23T20:30:00

Data(s)

11/11/1990

Resumo

Cores from Sites 689 and 690 of Ocean Drilling Program Leg 113 provide the most continuous Paleocene and Eocene sequence yet recovered by deep sea drilling in the high latitudes of the Southern Ocean. The nannofossil-foraminifer oozes and chalks recovered from Maud Rise at 65°S in the Weddell Sea provide a unique opportunity for biostratigraphic study of extremely high southern latitude carbonate sediments. The presence of warm water index fossils such as the discoasters and species of the Tribrachiatus plexus facilitate the application of commonly used low latitude calcareous nannofossil biostratigraphic zonation schemes for the upper Paleocene and lower Eocene intervals. In the more complete section at Site 690, Okada and Bukry Zones CP1 through CP10 can be identified for the most part with the possible exception of Zone CP3. Several hiatuses are present in the sequence at Site 689 with the most notable being at the Cretaceous/Tertiary and Paleocene/Eocene boundaries. Though not extremely diverse, the assemblage of discoasters in the upper Paleocene and lower Eocene calcareous oozes is indicative of warm, relatively equable climates during that interval. A peak in discoaster diversity in uppermost Paleocene sediments (Zone CP8) corresponds to a negative shift in 5180 values. Associated coccolith assemblages are quite characteristic of high latitudes with abundant Chiasmolithus, Prinsius, and Toweius. Climatic cooling is indicated for middle Eocene sediments by assemblages that contain very abundant Reticulofenestra, lack common discoasters and sphenoliths and are much less diverse overall. Two new taxa are described, Biscutum? neocoronum n. sp. and Amithalithina sigmundii n. gen., n. sp.

Formato

application/zip, 5 datasets

Identificador

https://doi.pangaea.de/10.1594/PANGAEA.753320

doi:10.1594/PANGAEA.753320

Idioma(s)

en

Publicador

PANGAEA

Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted

Fonte

Supplement to: Pospichal, James J; Wise, Sherwood W (1990): Paleocene to middle Eocene calcareous nannofossils of ODP Sites 689 and 690, Maud Rise, Weddell Sea. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 613-638, doi:10.2973/odp.proc.sr.113.205.1990

Palavras-Chave #113-689B; 113-690; 113-690B; 113-690C; A. cumbiformis specillara; A. octoradiata; A. scotus; A. sigmundii; Acuturris scotus; Ahmuellerella octoradiata; Amithalithina sigmundii; Arkhangelskiella cumbiformis specillara; Arkhangelskiella spp.; B. castrorum; B. magnum; B. neocoronum; B. sparsus; Biantholithus sparsus; Biscutum castrorum; Biscutum magnum; Biscutum neocoronum; Biscutum sp.; Braarudosphaera sp.; C. bidens; C. californicus; C. cavus; C. conicus; C. consuetus; C. daniae; C. danicus; C. edwardsii; C. ehrenbergii; C. eograndis; C. expansus; C. formosus; C. pelagicus; C. primus; C. reinhardtii; C. solitus; C. tenuis; cf. C. luminis; cf. C. pelagicus; cf. D. bifax; cf. D. falcatus; cf. D. kuepperi; cf. D. praebifax; cf. N. cruciatus; Chiasmolithus bidens; Chiasmolithus californicus; Chiasmolithus consuetus; Chiasmolithus danicus; Chiasmolithus eograndis; Chiasmolithus expansus; Chiasmolithus solitus; Chiasmolithus sp.; Chiastozygus sp.; Coccolithus cavus; Coccolithus formosus; Coccolithus pelagicus; Coccolithus sp.; COMPCORE; Composite Core; Cretarhabdus conicus; Cribrosphaerella daniae; Cribrosphaerella ehrenbergii; Cruciplacolithus edwardsii; Cruciplacolithus primus; Cruciplacolithus tenuis; Cyclagelosphaera reinhardtii; Cyclicargolithus sp.; D. barbadiensis; D. binodosus; D. deflandrei; D. diastypus; D. elegans; D. falcatus; D. kuepperi; D. lenticularis; D. lodoensis; D. mediosus; D. megastypus; D. mohleri; D. multiradiatus; D. nobilis; D. praebifax; D. sublodoensis; Depth; DEPTH, sediment/rock; Discoaster barbadiensis; Discoaster binodosus; Discoaster deflandrei; Discoaster diastypus; Discoaster elegans; Discoaster falcatus; Discoaster kuepperi; Discoaster lenticularis; Discoaster lodoensis; Discoaster mediosus; Discoaster megastypus; Discoaster mohleri; Discoaster multiradiatus; Discoaster nobilis; Discoaster praebifax; Discoaster sp.; Discoaster sublodoensis; DRILL; Drilling/drill rig; E. distichus; E. lajollaensis; E. turriseiffelii; Eiffellithus turriseiffelii; Ellipsolithus distichus; Ellipsolithus lajollaensis; Epoch; F. involutus; F. tympaniformis; Fasciculithus involutus; Fasciculithus sp.; Fasciculithus tympaniformis; G = good, M = moderate, P = poor; Gartnerago spp.; genus and species indet.; Genus and species indet.; genus questionable; H. australis; H. cantabriae; H. edwardsii; H. kleinpellii; H. riedelii; H. teuriensis; H. universus; Heliolithus cantabriae; Heliolithus kleinpellii; Heliolithus riedelii; Heliolithus universus; Hornibrookina australis; Hornibrookina edwardsii; Hornibrookina teuriensis; Joides Resolution; K. magnificus; Kamptnerius magnificus; Lapideacassis sp.; Leg113; Lucianorhabdus sp.; M. apertus; M. decussata; M. inversus; Markalius apertus; Markalius inversus; Micula decussata; N. cearae; N. cristata; N. cruciatus; N. distentus; N. dubius; N. eosaepes; N. frequens; N. fulgens; N. junctus; N. modestus; N. perfectus; N. protenus; N. saepes; Nannofossil abundance; Nannofossils indeterminata; Nannofossils preservation; Nannofossil zone; Nannos abund; Nannos indet; Nannos preserv; Nannos zone; Nannotetrina cristata; Nannotetrina fulgens; Neochiastozygus cearae; Neochiastozygus distentus; Neochiastozygus eosaepes; Neochiastozygus junctus; Neochiastozygus modestus; Neochiastozygus perfectus; Neochiastozygus saepes; Neochiastozygus sp.; Neococcolithes dubius; Neococcolithes protenus; Neocrepidolithus cruciatus; Neocrepidolithus sp.; Nephrolithus frequens; Ocean Drilling Program; ODP; ODP sample designation; P. bisulcus; P. cretacea; P. dimorphosus; P. martinii; P. spinosa; P. stoveri; Pontosphaera sp.; Prediscosphaera cretacea; Prediscosphaera spinosa; Prediscosphaera stoveri; Prinsius bisulcus; Prinsius dimorphosus; Prinsius martinii; Prinsius sp.; R. daviesii; R. levis; R. onusta; R. reticulata; R. samodurovii; R. umbilicus; Reinhardtites levis; Reticulofenestra daviesii; Reticulofenestra onusta; Reticulofenestra reticulata; Reticulofenestra samodurovii; Reticulofenestra sp.; Reticulofenestra umbilicus; reworked mesozoic taxa; Rhomboaster sp.; S. editus; S. moriformis; S. radians; Sample code/label; Smear slide analysis; South Atlantic Ocean; Sphenolithus editus; Sphenolithus moriformis; Sphenolithus radians; T. bramlettei; T. callosus; T. contortus; T. crassa; T. craticulus; T. eminens; T. magnicrassus; T. operculata; T. orthostylus; T. selandianus; T. tovae; Thoracosphaera crassa; Thoracosphaera operculata; Thoracosphaera sp.; Thoracosphaera spp.; Toweius callosus; Toweius craticulus; Toweius eminens; Toweius magnicrassus; Toweius selandianus; Toweius tovae; Tribrachiatus bramlettei; Tribrachiatus contortus; Tribrachiatus orthostylus; V = very abundant (10 nannofossils/field of view), A = abundant (1-10 nannofossils/field of view), C = common (1 nannofossil/2 fields of view); Z. bijugatus; Z. herlynii; Z. sigmoides; Zygodiscus herlynii; Zygodiscus sigmoides; Zygrhablithus bijugatus
Tipo

Dataset