Late Triassic (Carnian– Rhaetian) palynology of Hopen, Svalbard

Paterson, Niall W.; Mangerud, Gunn

doi:10.1016/j.revpalbo.2015.05.001

Cited by 34 publications

(138 citation statements)

References 30 publications

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“…Whilst these may have been derived from remains from the De Geerdalen Formation on Hopen show a dominance of ferns and conifer flora (Launis et al, 2014), suggesting a more temperate environment for the De Geerdalen Formation. This is also supported by palynofacies and palaeogeography studies from Hopen (Paterson & Mangerud, 2015;Paterson et al, 2016).…”

Section: Regional Comparisonsupporting

confidence: 61%

“…Due to the paralic nature of the Upper Triassic in eastern Svalbard (Mørk et al, 1999a;Klausen & Mørk, 2014;Lord et al, 2014a, b;Paterson & Mangerud, 2015;Paterson et al, 2016; this study), individual facies associations are difficult to correlate laterally over wide areas. To overcome this problem and to ease regional correlation, the facies associations have been grouped into four gross depositional environments (DE).…”

Section: Depositional Environmentsmentioning

confidence: 88%

“…6 It should be noted that despite well constrained palynological dating for most of the lithostratigraphic units in the Triassic succession of Svalbard (e.g., Vigran et al, 2014;Paterson & Mangerud, 2015;Paterson et al, 2016), the middle Carnian unit is poorly constrained and the present assignment should therefore be considered subjective. The middle Carnian age assignment is based entirely on indirect stratigraphic relationships between the middle Carnian unit, the underlying early Carnian Tschermakfjellet Formation and the overlying Isfjorden Member (late Carnian to early Norian).…”

Section: Stratigraphic Distribution and Correlation Of Depositional Ementioning

confidence: 99%

“…3A, 10;Edwards, 1976;Anell et al, 2013;Osmundsen et al, 2014;Rød et al, 2014). The Carnian succession on Hopen is largely composed of fluvial deltaplain sediments with subordinate marine-influenced deposits (Klausen & Mørk, 2014;Lord et al, 2014a, b) and is late Carnian in age (Paterson & Mangerud, 2015;Patterson et al, 2016).…”

Section: Regional Comparisonmentioning

confidence: 99%

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Facies development of the Upper Triassic succession on Barentsøya, Wilhelmøya and NE Spitsbergen, Svalbard

Lord¹,

Johansen²,

Støen³

et al. 2017

NJG

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Field data collected from the northeasternmost Triassic exposures on the islands of Spitsbergen, Wilhelmøya and Barentsøya during 2015 are used for sedimentological facies analysis to improve our understanding of the stratigraphic development of the Upper Triassic strata. Results presented here build upon previous studies from the eastern areas of the Svalbard archipelago and seek to extend this understanding northward. Paralic deltaic sediments are recognised throughout the field area, and our analysis shows that the Upper Triassic De Geerdalen Formation is composed of three discrete units defined by the differences in gross depositional environments. The lower interval of early Carnian age is dominated by shallow-marine and delta-front/ shoreface deposits, the middle interval of mid Carnian age is dominated by delta-front to delta-top deposits, and the upper interval, corresponding to the Isfjorden Member, of a late Carnian to early Norian age, is dominated by delta-top deposits which include lagoonal and lacustrine deposits. These observations show that the De Geerdalen Formation represents a more distal depositional setting, than the depositional environments previously reported from the islands of Edgeøya and Hopen. We also document the presence of the Tschermakfjellet Formation and Isfjorden Member on Wilhelmøya, thus increasing our understanding of the northwestward development of the Upper Triassic succession in Svalbard.

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Section: Regional Comparisonsupporting

confidence: 61%

Section: Depositional Environmentsmentioning

confidence: 88%

Section: Stratigraphic Distribution and Correlation Of Depositional Ementioning

confidence: 99%

Section: Regional Comparisonmentioning

confidence: 99%

See 2 more Smart Citations

Facies development of the Upper Triassic succession on Barentsøya, Wilhelmøya and NE Spitsbergen, Svalbard

Lord¹,

Johansen²,

Støen³

et al. 2017

NJG

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“…The first regional palynozonation for the Triassic in this region was published by Hochuli et al (1989). Recent studies (Vigran et al, 2014;Paterson & Mangerud, 2015 have formalized the zonal scheme, and provided further calibration against the regional ammonoid zonation of Dagys & Weitschat (1993). Despite this recent progress, very little published palynological data exists for the Havert Formation beyond the type area in the Hammerfest Basin.…”

Section: Geological Settingmentioning

confidence: 99%

Mud‐rich delta‐scale compound clinoforms in the Triassic shelf of northern Pangea (Havert Formation, south‐western Barents Sea)

et al. 2019

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In recent years it has become clear that many shallow‐marine heterolithic and mudstone‐dominated successions are deposited as mud belts forming part of subaqueous deltas that are related to major fluvial sources either upstream or along shore. Here the Havert Formation is presented as an ancient example of this kind of system. The Havert Formation in the south‐western Barents Sea represents shelf margin clinoforms consisting predominantly of heterolithic deposits. Sediments were mainly derived from the east (Ural Mountains), but a smaller system prograded northward from Fennoscandia. The Havert Formation holds a lot of interest due to: (i) its stratigraphic position, directly above the Permo–Triassic boundary and contemporaneous to the emplacement of the Siberian Traps; (ii) the fact that it represents the first siliciclastic input in the south‐western Barents Sea and it shows interaction between Uralian‐derived and Fennoscandian‐derived sediments; and (iii) its hydrocarbon potential. This study is focused on a detailed sedimentological analysis of cored intervals of the (Ural‐derived) Havert Formation, in combination with seismic interpretation, well‐log correlations and palynological analysis of the Havert and overlying Klappmyss formations. The cored intervals belong to the shelf environment of the Havert shelf‐margin clinoforms (300 to 500 m thick). This sedimentological analysis distinguishes six facies associations, spanning from tidally‐influenced channels at the shoreline to mud‐rich subaqueous platform and foresets of the subaqueous delta. Seismic lines and well‐log correlations show the larger‐scale evolution of the Ural‐derived Havert Formation, characterized by episodes of low‐accommodation and high‐accommodation. The palynological analyses provide the first detailed study of the Havert Formation in the Nordkapp Basin, revising its depositional age in the region as Induan to early Olenekian (Smithian). Furthermore, they strengthen the environmental interpretation; palynofacies present on the shelf record flora of tidally‐influenced coastal plains, whereas the palynofacies in the deep‐water slope contain only amorphous organic matter.

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Lycopsid megaspores from the Upper Triassic of Svalbard and their relationship to the floras and palaeoenvironments of northern Pangaea

Paterson

Morris²,

Mangerud

2019

Papers in Palaeontology

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Triassic megaspore assemblages from Svalbard, Arctic Norway, are described for the first time based on the analysis of the Upper Triassic (Carnian-Norian/Rhaetian) Kapp Toscana Group on the island of Hopen. Two megaspore zones are described: the late Carnian 'Dijkstraisporites beutleri Zone' (undifferentiated De Geerdalen Formation), and the Norian/Rhaetian 'D. beutleri-Verrutriletes preutilis Zone' (Svenskøya Formation). Megaspores are attributed to heterosporous lycopsids, and probably correspond to the microspore Aratrisporites, which was observed in palynological preparations. Megaspore occurrence was highest in delta-plain and associated with lake-mire deposits. However, their close association with marine microfossils suggests episodic marine influence and is consistent with previous interpretations that some Triassic lycopsids occupied marginal marine habitats. The absence of megaspores in the overlying Hopen Member and Flatsalen Formation is probably related to a marine transgression during the early Norian, as indicated by the recovery of low diversity assemblages of agglutinated foraminifera. The transition to ostracod-dominated microfaunas in the middle part of the formation is consistent with a regionally extensive maximum flooding surface, prior to a return to megaspore-dominated assemblages in the fluvio-deltaic deposits of the Svenskøya Formation. Despite the abundance of their mega and microspores, lycopsid fossils are almost entirely absent within palaeobotanical collections from the island, which we ascribe to their herbaceous habit and consequent low preservation potential. The results of this study show lycopsids to be an important component of the local ecosystem and thus contribute to a more complete understanding of the Late Triassic floras of northern-most Pangaea.

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Late Triassic (Carnian– Rhaetian) palynology of Hopen, Svalbard

Cited by 34 publications

References 30 publications

Facies development of the Upper Triassic succession on Barentsøya, Wilhelmøya and NE Spitsbergen, Svalbard

Facies development of the Upper Triassic succession on Barentsøya, Wilhelmøya and NE Spitsbergen, Svalbard

Mud‐rich delta‐scale compound clinoforms in the Triassic shelf of northern Pangea (Havert Formation, south‐western Barents Sea)

Lycopsid megaspores from the Upper Triassic of Svalbard and their relationship to the floras and palaeoenvironments of northern Pangaea

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