10.1594/PANGAEA.743927
Head, Martin J
Martin J
Head
Norris, Geoffrey
Geoffrey
Norris
Mudie, Peta J
Peta J
Mudie
Stratigraphic distribution of marine palynomorph species recorded for the Miocene of ODP Hole 105-645E (Table 1)
PANGAEA
1989
Epoch
Dinoflagellate zone
Sample code/label
Xandarodinium sp.
Batiacasphaera gemmata
Batiacasphaera sp.
Evittosphaerula paratabulata
Distatodinium paradoxum
Systematophora ancyrea
Impletosphaeridium prolatum
Cordosphaeridium minimum
Lingulodinium machaerophorum
Palaeocystodinium golzowense
Lejeunecysta spp.
Brigantedinium spp.
Operculodinium centrocarpum
Reticulatosphaera actinocoronata
Batiacasphaera micropapillata
Impagidinium pallidum
Nematosphaeropsis lemniscata
Selenopemphix sp.
Dinopterygium cladoides
Lophocysta sp.
Melitasphaeridium choanophorum
Acritarch sp.
Pyxidiella-Pyxidiniopsis group
Heteraulacacysta sp.
Dapsilidinium pseudocolligerum
Hystrichokolpoma rigaudiae
Paralecaniella indentata
Spiniferites spp.
Operculodinium sp.
Cribroperidinium tenuitabulatum
Impagidinium sp.
Hystrichosphaeropsis sp.
Apteodinium spiridoides
Cordosphaeridium cantharellum
Dinoflagellate cyst indeterminata
Palaeocystodinium cf. golzowense
Labyrinthodinium truncatum
Pyxidinopsis sp.
Thalassiphora sp.
Selenopemphix brevispinosa
Nematosphaeropsis downiei
Sumatradinium sp.
Tectatodinium sp.
Cymatiosphaera baffinensis
Batiacasphaera sphaerica
Foraminifera, linings
Selenopemphix nephroides
Nematosphaeropsis labyrinthus
Cyclopsiella spiculosa
Spiniferites pseudofurcatus
Cerebrocysta sp.
Pentadinium laticinctum laticinctum
Trinovantedinium sp.
Operculodinium israelianum
Impagidinium maculatum
Invertocysta tabulata
Cannosphaeropsis sp.
Nematosphaeropsis sp.
Habibacysta tectata
Cymatiosphaera sp.
Labyrinthodinium sp.
Impagidinium spp.
Impagidinium aquaeductum
Pentadinium sp.
Cristadinium sp.
Spiniferites sp.
Impletosphaeridium sp.
Scolecodonta
Cristadinium cristatoserratum
Leiosphaeridia sp.
Cymatiosphaera invaginata
Apteodinium sp.
Impagidinium velorum
Cyclopsiella sp.
Pentadinium laticinctum
Impagidinium patulum
Tuberculodinium vancampoae
Xandarodinium variable
Drilling/drill rig
Age model, paleomag, Berggren et al (1985)
DSDP/ODP/IODP sample designation
Leg105
Joides Resolution
Ocean Drilling Program (ODP)
1985-09-13T17:00:00/1985-09-27T20:30:00
en
Supplementary Dataset
10.2973/odp.proc.sr.105.137.1989
4725 data points
text/tab-separated-values
Creative Commons Attribution 3.0 Unported
A total of 145 samples were analyzed for palynology, and all were found to be productive. Residues are dominated by pollen, terrestrial spores, and land plant tissues. Marine palynomorphs occur in all samples, which allowed us to recognize five Miocene dinocyst assemblage zones. Dinocyst assemblages indicate cool-water conditions and suggest a neritic rather than fully oceanic environment, with not only North Atlantic and Norwegian Sea affinities, but also containing both notable protoperidiniacean and possible endemic elements. Dinocyst assemblages indicate an early Miocene age for the bottom of Hole 645E and an age no younger than early late Miocene (Sample 105-645E-24R, CC) near the top of the interval studied. These age assignments provide an estimated initiation of ice rafting in Baffin Bay at between 7.4 and 9.5 Ma. Increased terrigenous influx and apparent disappearance of certain dinocyst taxa occur in the middle to late Miocene and may be related to oceanographic changes or climatic deterioration. Spores and pollen indicate a climate that varied within a temperate regime during the early and middle to early late Miocene, followed by climatic deterioration.
Four new dinocyst species are described: Batiacasphaera gemmata, Impletosphaeridium prolatum, Operculodinium vacuolatum, and Selenopemphix brevispinosa. The acritarch genus Cyclopsiella Drugg and Loeblich is emended, and two new combinations have been created: Cyclopsiella granosa (Matsuoka) and Cyclopsiella? laevigata (Chateauneuf). Cyclopsiella granosa (Matsuoka) n. comb. is considered a subjective junior synonym of Cyclopsiella granulata He and Li. Ascostomocystis granulatus Chateauneuf has been provisionally allocated to Cyclopsiella and renamed Cyclopsiella? chateauneufii. Two new acritarch species are described: Cyclopsiella spiculosa and Cymatiosphaera! baffinensis.
Species abundance: R = rare, C = common, A = abundant, DR = presumed reworking, - = absent.
Supplement to: Head, Martin J; Norris, Geoffrey; Mudie, Peta J (1989): Palynology and dinocyst stratigraphy of the Miocene in ODP Leg 105, Hole 645E, Baffin Bay. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 467-514
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Baffin Bay