Dinoflagellate and spore stratigraphy of the Mesozoic-Cenozoic, offshore eastern Canada

Williams, Graham L.

doi:10.4095/102513

Cited by 60 publications

(95 citation statements)

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“…This species ranges from Samples 105-647A-61R, CC through -24R-2, 142-145 cm. P. comatum has been recorded from the Eocene of Europe (Chateauneuf, 1980;Liengjarern et al, 1980;Bujak et al, 1980;Islam, 1982Islam, , 1983bMurray et al, 1987 andas "P. tritonium," in Eaton, 1976;De Coninck, 1977, andMichoux, 1985); south western Atlantic (Goodman and Ford, 1983), eastern U.S. (Edwards, 1984), northeastern Atlantic (Costa and Downie, 1979b); offshore east ern Canada (Williams and Bujak, 1977b); North Sea (Ioakim, 1979); offshore northeastern Africa (Williams, 1978); and Australia (L. Stover, pers, comm., in Goodman and Ford, 1983, p. 862). It has been recorded from the lower Oligocene of Europe (Morgenroth, 1966b;Liengjarern et al, 1979;Chateauneuf, 1980;Biffi and Manum, 1988), basal Oligo cene of the North Sea (Ioakim, 1979), lower Oligocene of the southwest ern Atlantic (Goodman and Ford, 1983), lower Oligocene of offshore eastern U.S. (Stover, 1977), lower and lower upper?…”

Section: Cordosphaeridium Funiculatum Sensumentioning

confidence: 99%

Palynology and Dinocyst Stratigraphy of the Eocene and Oligocene in ODP Leg 105, Hole 647A, Labrador Sea

Head¹,

Norris²

1989

Proceedings of the Ocean Drilling Program

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Dinoflagellate cysts were recovered throughout the Paleogene succession of Hole 647A, which contains an almost complete deep-water record of early Eocene through early late Oligocene sedimentation in the Labrador Sea. Dinofla gellate cyst biostratigraphy is in general accord with that provided by other microfossil groups and is consistent with a lower Eocene age, as determined by nannofossils, for basal sediments in Hole 647A. These sediments overlie oceanic crust of Chron 24 age.Dinocyst assemblages indicate outer neritic to oceanic conditions throughout, although the persistent occurrence of Wetzeliellaceae specimens in the lower Eocene suggests a greater influence from shelf environments during this time. Lower Eocene dinocyst assemblages are similar to coeval assemblages from the Rockall Plateau, but those from the middle to upper Eocene have mixed affinities and may be related to the intensification of the proto-Gulf Stream from middle Eocene time. Oligocene dinocyst assemblages suggest the influence of both arctic and North Atlantic water masses at this site. The presence of protoperidineacean species in the upper Eocene and Oligocene may indicate in creased availability of nutrients, perhaps related to increased upwelling or the effects of water-mass mixing.Productive samples are dominated by dinocysts and acritarchs, while sporomorphs are represented mainly by bisaccate pollen. Preservational differences within samples may reflect mixing of penecontemporaneous dinocyst popula tions during the Eocene, and all samples examined may have a considerable allochthonous component. Variability in relative abundance of many species during the Eocene may be related to fluctuating water-mass properties.A total 175 dinocyst and acritarch taxa were recorded from 53 productive samples from the Paleogene. Only one Pa leogene sample was barren of palynomorphs. Of three Miocene samples processed, all were barren.

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Section: Cordosphaeridium Funiculatum Sensumentioning

confidence: 99%

Palynology and Dinocyst Stratigraphy of the Eocene and Oligocene in ODP Leg 105, Hole 647A, Labrador Sea

Head¹,

Norris²

1989

Proceedings of the Ocean Drilling Program

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“…There is no formal dinoflagellate cyst zonation for the Neogene and Quaternary, although Williams ( , 1979, Williams and Brideaux (1975), Gradstein and Williams (1976), and Williams and Bujak (1977) have developed an informal scheme based primarily on material from offshore eastern Canada. Other informal schemes have been proposed by Manum (1976) for the Tertiary of the Norwegian-Greenland Sea, by Harland (1978Harland ( , 1979 for the Neogene and Quaternary of the Bay of Biscay, by Costa and Downie (1979) for the Cenozoic of the Rockall Plateau, and by Piasecki (1980) for the Miocene of Denmark.…”

Section: Dinoflagellate Ranges and Zonesmentioning

confidence: 99%

Neogene and Quaternary Dinoflagellate Biostratigraphy of the Eastern Equatorial Pacific: Deep Sea Drilling Project Leg 85

Jarvis¹,

Tocher²

1985

Initial Reports of the Deep Sea Drilling Project

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Samples from DSDP Leg 85 Sites 572-575 in the central equatorial Pacific were analyzed for palynomorph content; only those from Site 572 consistently yielded assemblages of Neogene-Quaternary dinoflagellate cysts. These assemblages are described and compared with coeval material from elsewhere in the world. Several of the 15 species identified are stratigraphically restricted, and comparison with published ranges suggests that they may provide worldwide stratigraphic indices. Nematosphaeropsis labyrinthea (Ostenfeld) Reid and identified species of the genus Impagidinium range from middle Miocene to Quaternary. Palaeocystodinium golzowense Alberti disappears in the middle Miocene and Pyxidiella simplex Harland is restricted to the basal upper Miocene. Operculodinium cf. israelianum Wall and Spiniferites bentorii truncatus (Rossignol) Lentin and Williams are Quaternary species. An increased abundance of dinoflagellate cysts in the uppermost Miocene at Site 572 is associated with the common occurrence of the diatom genera Thalassionema and Thalassiothrix, which are regarded as indicators of upwelling. The higher concentration of dinoflagellate cysts in this interval is related to the location of the site below the equatorial high productivity belt at a time of enhanced local upwelling in the eastern equatorial Pacific.

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“…The most abundant Germeraad et al (1968), or the Ambrosia and Taraxacum types of Williams (1975) and other authors. Although this family has a fossil record extending questionably into the Oligocene (Leopold, 1969) it is first reliably recorded on all continents from early to middle Miocene (Germeraad et al, 1968;Stover and Partridge, 1973;Williams, 1975) Drugg and Stover (1975) and Harker and Sarjeant (1975) the species Homotryblium floripes (Deflandre and Cookson), Pentadinium laticinctum Gerlach, Scriniodinium australiense (Deflandre and Cookson), and Systematophora placacantha (Deflandre and Cookson) are not recorded as occurring in sequences younger than middle to late Miocene. If these ranges are valid for the Angola Basin a youngest age limit of late Miocene is imposed on the assemblages.…”

Section: Late Tertiary Assemblagesmentioning

confidence: 99%

Palynology of the Late Tertiary Sequence at Site 365, Leg 40, Deep Sea Drilling Project

Partridge¹

1978

Initial Reports of the Deep Sea Drilling Project

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Dinoflagellate and spore stratigraphy of the Mesozoic-Cenozoic, offshore eastern Canada

Cited by 60 publications

References 0 publications

Palynology and Dinocyst Stratigraphy of the Eocene and Oligocene in ODP Leg 105, Hole 647A, Labrador Sea

Palynology and Dinocyst Stratigraphy of the Eocene and Oligocene in ODP Leg 105, Hole 647A, Labrador Sea

Neogene and Quaternary Dinoflagellate Biostratigraphy of the Eastern Equatorial Pacific: Deep Sea Drilling Project Leg 85

Palynology of the Late Tertiary Sequence at Site 365, Leg 40, Deep Sea Drilling Project

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