Oxfordian-Kimmeridgian Dinoflagellate assemblage, Ringnes Formation, Arctic Canada

Tan, Justin; Hills, L. V.

doi:10.4095/104592

Cited by 7 publications

(7 citation statements)

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“…In the dinoflagellate floras of most regions so far investigated around the North Atlantic the Jurassic-Cretaceous turn-over is clearly seen in a number of characteristic species appearing in the latest Volgian -earliest Ryazanian, whereas their appearance is delayed to well into the Valanginian in the Wandel Sea Basin. It appears that a similar delay has been observed in northern Canada (Brideaux & Fisher 1976, Tan & Hills 1978.…”

Section: Delayed Appearance Of Cretaceous Dinoflagellatessupporting

confidence: 70%

Jurassic - Cretaceous boundary strata of the extreme Arctic (Peary Land,.North Greenland)

Håkansson

Birkelund

Piasecki

et al. 1981

bgsd

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A fossiliferous Late Jurassic-Early Cretaceous sequence is described from the Wandel Sea Basin, eastern North Greenland. The area was transgressed in the Middle Oxfordian and a gradually shallowing marine regime prevailed until Early Valanginian time, when conditions became !ironic. Stratigraphic data based on dinoflagellate cysts, ammonites and Buchia species indicate the presence of strata of Middle and Late Oxfordian, Kimmeridgian, Middle and Late Volgian, Early and Late Ryazanian, and Early Valanginian ages. Both the dinoflagellate assemblages and the mollusc faunas show close similarity to assemblages from the Sverdrup Basin of the Canadian Arctic Archipelago, Svalbard and northern USSR. They are also linked to more southern Boreal and Sub-Boreal areas in East Greenland, England, the Russian Platform and to some extent, North America. An integrated dinoflagellate-ammonite-Buchia stratigraphy shows that the Early Cretaceous dinoflagellate assemblage appeared later in the Wandel Sea Basin than further south. It is also seen that a discrete "Jurassic" dinoflagellate assemblage existed for some time in the Early Cretaceous unaffected by the general tum-over at the Jurassic-Cretaceous boundary. Dinoflagellate, ammonite and Buchia assemblages are briefly discussed and selected species figured.

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Section: Delayed Appearance Of Cretaceous Dinoflagellatessupporting

confidence: 70%

Jurassic - Cretaceous boundary strata of the extreme Arctic (Peary Land,.North Greenland)

Håkansson

Birkelund

Piasecki

et al. 1981

bgsd

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“…paeminosa) yet is characterized by an endemic association. This was termed the "borealis" assemblage by Brideaux and Fisher (1976) and includes Horologinella spinosigibberosa Brideaux & Fisher 1976, Paragonyaulacysta borealis (Brideaux & Fisher 1976) Stover & Evitt 1978and P. cappilosa (Brideaux & Fisher 1976 Stover & Evitt 1978 (see also Tan andHills, 1978, andDavies, 1983).…”

Section: Comparison With Other Studies Of Northern Hemisphere Kimmerimentioning

confidence: 98%

Dinoflagellate cyst stratigraphy of the Kimmeridge Clay (Upper Jurassic) from the Dorset coast, Southern England

Riding

Thomas

1988

Palynology

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A palynological investigation of the Upper Jurassic Kimmeridge Clay in its type area (Dorset, southern England) identified twenty-five stratigraphically useful dinoflagellate cyst datums (range tops and bases). These have enabled the Kimmeridgian dinoflagellate cyst zonation of Woollam and Riding (1983) to be substantially refined. Eleven subzones are established within Woollam and Riding's Gonyaulacysta jurassica -Scriniodinium crystallinum (Gj/Sc), Scriniodinium luridum (SI) and Glossodinium dimorphum -Dingodinium tuberosum (Gd/Dt) zones, which span part of the Oxfordian and the entire Kimmeridgian stages. The indices of these zones, and the overlying Ctenidodinium culmulum -Ctenidodinium panneum (Cc/Cp) Zone, are amended and their definitions revised.The dinoflagellate cyst floras are broadly comparable to others from northern Europe, but show certain differences with coeval Tethyan assemblages. Two new skolochorate dinoflagellate cyst species are described, Oligosphaeridium patulum sp. nov. and Systematophora daveyi sp. nov.

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“…These differences were most pronounced in the Kimmeridgian to Volgian (Tithonian) interval. According to Raynaud (1978), Late Callovian -Early Oxfordian floras were uniform throughout Arctic Canada, East Greenland, Europe and Svalbard (Beju 1971;Johnson & Hills 1973;Tan & Hills 1978;Bjaerke 1980;Poulsen 1984). The rising palaeotemperatures during the Late Callovian and Oxfordian, together with the marine connection between the Boreal and Tethyan oceans, appear to have created a cosmopolitan floral province during this interval in the Northern Hemisphere.…”

Section: Biozonation Palaeotemperature and Sea-level Changesmentioning

confidence: 99%

The Jurassic dinoflagellate cyst zonation of Subboreal Northwest Europe

Poulsen

Riding

2003

GEUS Bulletin

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With an appendix by Bjørn Buchardt: Oxygen isotope palaeotemperatures from the Jurassic in Northwest EuropeThe Jurassic dinoflagellate cyst zonation for the British-Danish area is revised and discussed in relation to palaeoenvironmental factors, in particular, eustatic changes and fluctuations in palaeotemperature. The stepwise evolution of dinoflagellate cyst assemblages as defined by inceptions and apparent extinctions was largely controlled by sea-level change, particularly during intervals with significant short-term eustatic fluctuations. During times characterised by less pronounced, or longer term, sea-level change, fluctuations in oceanic palaeotemperatures appear to have influenced dinoflagellate evolution. Differences in the ranges of certain taxa between Denmark and the United Kingdom may be partly related to differences in palaeotemperature.

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Oxfordian-Kimmeridgian Dinoflagellate assemblage, Ringnes Formation, Arctic Canada

Cited by 7 publications

References 0 publications

Jurassic - Cretaceous boundary strata of the extreme Arctic (Peary Land,.North Greenland)

Jurassic - Cretaceous boundary strata of the extreme Arctic (Peary Land,.North Greenland)

Dinoflagellate cyst stratigraphy of the Kimmeridge Clay (Upper Jurassic) from the Dorset coast, Southern England

The Jurassic dinoflagellate cyst zonation of Subboreal Northwest Europe

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