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- W2017662605 abstract "The Gneudna Formation is a Late Devonian(Frasnian) sequence of marine calcareous sediments that occurs in the Carnarvon Basin, Western Australia. The present palynological study is based upon subsurface silty strata from a borehole (Pelican Hill or Bibbawarra Bore) that was drilled early this century near the western coastal limit of the Carnarvon Basin. The subject strata have previously been attributed to the Gneudna Formation on lithostratigraphic grounds. They contain a rich and varied assemblage of marine microphytoplankton (acritarchs), associated with trilete miospores of which Geminospora lemurata Balme, 1962 is the dominant form. Forty-seven species of acritarchs are recognizable in the palynoflora, which corresponds very closely with that described recently (Playford & Dring, 1981) from the Gneudna Formation in the vicinity of its type section on the opposite (eastern) side of the Carnarvon Basin. The apparently parochial complexion of the Gneudna acritarch suite is probably illusory, insofar as early Late Devonian acritarchs have not been studied extensively or intensively from either the northern or southern hemispheres. The following new species of acritarchs areformally instituted herein: Elektoriskos villosa, Lophosphaeridium pelicanensis, and Pterospermella tenellula. Dans le Bassin de Carnarvon, en Australie Occidentale, la Formation Gneudna d'âge dévonien supérieur (frasnien) est formée de sédiments marins calcaires. La présente étude palynologique concerne des dépôts silteux d'un sondage («Pelican Hill ou «Bibbawarra) foré au début de ce siècle près de la limite côtière du Bassin de Carnarvon. D'après des critères lithostratigraphiques, cescouches ont précédemment été attribuées à la Formation Gneudna. Elles contiennent un assemblage riche et varié de microphytoplancton marin (acritarches) associé à des miospores trilètes parmi lesquelles Geminospora lemurata Balme, 1962 est une forme dominante. Quarante-sept espèces d'acritarches sont reconnues; elles sont proches de celles décrites par G. Playford & R.S. Dring (1981) en provenance de la Formation Gneudna au voisinage de la section-type sur le côté opposé et oriental du Bassin de Carnarvon. Le caractère apparemment local des acritarches de la Formation Gneudna est probablement artificiel et dû au peu d'études consacrées à leur sujet dans le Dévonien supérieur tant de l'Hémisphère Nord que Sud. Les espèces suivantes sont créées: Elektoriskos villosa, Lophosphaeridium pelicanensis et Pterospermella tenellula." @default.
- W2017662605 created "2016-06-24" @default.
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- W2017662605 date "1981-01-01" @default.
- W2017662605 modified "2023-09-27" @default.
- W2017662605 title "Late Devonian Acritarchs from the Gneudna formation in the Western Carnarvon basin, Western Australia" @default.
- W2017662605 cites W2027145314 @default.
- W2017662605 doi "https://doi.org/10.1016/s0016-6995(81)80001-0" @default.
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