Additional Microplankton from Australian Late Mesozoic and Tertiary Sediments.

Cookson, IC

doi:10.1071/mf9560183

Cited by 47 publications

(27 citation statements)

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“…Specimens from Hole 647A do not have the large antapical opening of D. rugosum and thus were assigned provisionally. D. nudum may have a range of late early to late Eocene (Cookson, 1965;Costa and Downie, 1979b;Barss et al, 1979;Michoux, 1985), although it is restricted to upper Zone NP 13 and lower Zone NP 14 at Sites 405 and 406 in the Rockall Plateau (Costa and Downie, 1979b). D. rugosum was recorded from the lower Paleocene of eastern U.S.A. (Drugg, 1970) and has a range of upper Pa leocene Zone NP3 to middle Eocene Zone NP15 (Williams and Bujak, 1985).…”

Section: Cordosphaeridium Funiculatum Sensumentioning

confidence: 99%

“…4) Remarks. D. rugosum differs from D. nudum (Cookson, 1965) in having a rugulate, rather than finely granulate, wall surface and a larger distal opening in the antapical process (Drugg, 1970). Specimens from Hole 647A do not have the large antapical opening of D. rugosum and thus were assigned provisionally.…”

Section: Cordosphaeridium Funiculatum Sensumentioning

confidence: 99%

“…"Rhombodinium" glabrum (Cookson, 1956) Vozzhennikova, 1967 Remarks. This species was not discussed by Bujak (1979) in his emen dation of Rhombodinium, but clearly it possesses a free, detached oper culum (Cookson, 1956), which excludes it from Rhombodinium as emended by Bujak, and for which reason we have retained it only tenta tively in this genus.…”

Section: Cordosphaeridium Funiculatum Sensumentioning

confidence: 99%

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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%

Section: Cordosphaeridium Funiculatum Sensumentioning

confidence: 99%

Section: Cordosphaeridium Funiculatum Sensumentioning

confidence: 99%

See 1 more Smart Citation

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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“…H. pulchrum Deflandre (1936), Isabelidinium pellucidum Deflandre and Cookson (1955), Manumiella? cretacea (Cookson, 1956), Bujak and Davies (1983), Paleocystodinium lidiae (Górka,1963), Davey (1969), Paleocystodinium golzowense Alberti (1961), Tanyosphaeridinium cf. T. xanthiopyxides (Wetzel, 1933) Morgenroth (1968, and Trichodinium castanea Deflandre (1935).…”

Section: Resultsmentioning

confidence: 99%

Similarities of the K/Pc dinoflagellate cyst associations between South Atlantic and Indian proto-oceans

Menezes¹,

Garcia²,

Premaor³

et al. 2016

Geol. USP. Sér. Cient.

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In this contribution we present the composition of the Late Cretaceous / Paleocene dinoflagellate cyst assemblages found in the Pelotas Basin, southern Brazil in order to provide a first paleobiogeographical comparison between this location, India and other former Gondwana continents: South America (Argentina and Uruguay), Africa (Nigeria and Western Ghana), Antarctica, Australia, and New Zealand. A total of 13 taxa, some endemic and other cosmopolitan were identified. The paleoenvironment of the Gondwana former members basins, as previously presented and attested by the dinoflagellate cysts are marginal marine nearshore, varying from neritic to shallow neritic and lagoonal or coastal swamps, which permitted the deposition of sediments in anoxic marine conditions. The present analysis of similarity between K/Pc dinoflagellate cyst associations allowed the establishment of paleobiogeographic distribution.

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“…Some evidence indicates that certain hystrichomorphs are members of the Dinoflagellata (Cookson, 1956;Braarud, 1945). Hystrichomorphs may be abundant in modern marine sediments (McKee, Chronic, and Leopold, 1959), though they are occasionally found as fossils in continental deposits.…”

Section: Family Hystrichosphaerideaementioning

confidence: 99%

A preliminary report on the pollen and spores of the pre-Selma Upper Cretaceous strata of western Alabama

Leopold¹

1964

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Additional Microplankton from Australian Late Mesozoic and Tertiary Sediments.

Cited by 47 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

Similarities of the K/Pc dinoflagellate cyst associations between South Atlantic and Indian proto-oceans

A preliminary report on the pollen and spores of the pre-Selma Upper Cretaceous strata of western Alabama

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