Cambrian-Ordovician Rocks Adjacent to Hinlopenstretet, North Ny Friesland, Spitsbergen

Fortey, Richard A.; Bruton, David L.

doi:10.1130/0016-7606(1973)84<2227:crathn>2.0.co;2

Cited by 59 publications

(74 citation statements)

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“…The exact thickness of the succession is not known as the scattered exposures make precise stratigraphic measurements difficult. In the present study we use the estimates and measurements provided by Fortey & Bruton (1973) for this succession.…”

Section: Regional Geology and Stratigraphymentioning

confidence: 99%

“…Thus during the Tremadocian the area was within tidal to subtidal environments. In the Floian there was a significant transgression and highstand, giving rise to a thick unit of black shales and carbonates (Fortey & Bruton 1973, Fortey 1975. Shallow-water carbonate environments were re-established in the Middle Ordovician.…”

Section: Regional Geology and Stratigraphymentioning

confidence: 99%

“…However, the succession is far from complete, including a hiatus covering the Middle and Upper Cambrian and possibly the basal Ordovician (Fortey & Bruton 1973). Three formations are recognized.…”

Section: Regional Geology and Stratigraphymentioning

confidence: 99%

“…At the top is the upper Floian to Middle Ordovician Valhallfonna Formation (Vallance & Fortey 1968) dominated by black, graptolite-rich shaly carbonates in the lower part changing to more massive, fossiliferous carbonates in the upper. Lithological descriptions are provided by Fortey & Bruton (1973) and Kosteva & Teben'kov (2006).…”

Section: Regional Geology and Stratigraphymentioning

confidence: 99%

“…The chronostratigraphic and biostratigraphic framework used here is based on Fortey & Bruton (1973), Fortey & Barnes (1977), Maletz & Bruton (2007, Bergström et al (2009), andSvend Stouge (pers. comm.…”

Section: Regional Geology and Stratigraphymentioning

confidence: 99%

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Diversity fluctuations and biogeography of Ordovician brachiopod faunas in northeastern Spitsbergen

Hansen¹,

Holmer²

2010

Bull. Geosci.

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Investigations of Lower and Middle Ordovician brachiopods in northeastern Spitsbergen have revealed strong ties to faunas in North America and Greenland at the generic level, although the fauna appears mostly endemic at the species level. During the early Palaeozoic, the archipelago of Svalbard, including Spitsbergen, was located at equatorial latitudes along the northeastern margin of Laurentia. The northeastern part of Spitsbergen experienced significant sea level changes, changing from very shallow water in the Tremadocian to deep water in the Floian and slowly back to shallow- water carbonate environments in the Middle Ordovician. The Tremadocian and early Floian brachiopod fauna was of low diversity with a high proportion of cosmopolitan warm-water related rhynchonelliform genera. In the late Floian there was an abrupt diversification event, taking place against the background of the increasing isolation of Laurentia, leading to a diverse, mostly endemic fauna. This diverse fauna remained into the Middle Ordovician. A similar diversification event has been recorded in North America, but here it occurs later, in the Dapingian. The diachroneity of brachiopod diversification within different parts of a continent has previously been shown for South China, suggesting that it may be a common phenomenon. In contrast to the mostly endemic Middle Ordovician rhynchonelliform genera, the linguliform brachiopods included many genera with a wide distribution. This difference is attributed to their different dispersal strategies

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Section: Regional Geology and Stratigraphymentioning

confidence: 99%

Section: Regional Geology and Stratigraphymentioning

confidence: 99%

Section: Regional Geology and Stratigraphymentioning

confidence: 99%

Section: Regional Geology and Stratigraphymentioning

confidence: 99%

Section: Regional Geology and Stratigraphymentioning

confidence: 99%

See 3 more Smart Citations

Diversity fluctuations and biogeography of Ordovician brachiopod faunas in northeastern Spitsbergen

Hansen¹,

Holmer²

2010

Bull. Geosci.

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Lower Ordovician Trilobites of the Kirtonryggen Formation, Spitsbergen

Fortey

Bruton

2013

Fossils and Strata

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BroeggeriaWalcott and other upper Cambrian and Tremadocian linguloid brachiopods from NW Argentina

2017

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The Broeggeria assemblage is a peculiar brachiopod association that has been recorded mainly from Tremadocian black shales of Baltoscandia, the Anglo‐Welsh Basin, Nova Scotia, South Urals and Kazakhstan. Here, we report a low diversity brachiopod association dominated by Broggeria omaguaca n. sp. from upper Tremadocian open‐shelf mudstones of northwestern Argentina. The dark‐grey transgressive muddy interval bearing the Broeggeria assemblage starts with an erosive flooding surface marked by a glauconite‐rich bed containing reworked bioclasts, which overlies storm‐dominated shoreface sandstones. Lithologic and taphonomic evidence indicates that the fauna from the mudstones represents a palaeocommunity inhabiting oxygen‐depleted bottoms. Besides Broeggeria omaguaca, which by far is the more abundant linguloid, the assemblage includes the obolids Palaeoglossa elongata (Harrington) and Libecoviella aff. tilcarensis Benedetto and Muñoz, and the punctate orthide Lipanorthis andinus Benedetto. Associated trilobites are abundant and low diversity, the more common being the large asaphid Asaphellus jujuanus Harrington. Coeval strata exposed in the Santa Victoria area contain rare specimens of Broeggeria omaguaca associated with Leptembolon argentinum Benedetto and Muñoz and Palaeoglossa elongata. Comparable dysoxic black shales of Furongian age bearing the olenid trilobite Parabolina (Neoparabolina) frequens have yielded a monospecific association of Lingulella n. sp. The records of Broeggeria at global scale support its late Cambrian origin in the Anglo‐Welsh Basin (Avalonia) and its rapid migration into the Karatau–Naryn terrane (a part of the Kazakhstanian collage). By the early Tremadocian, Broeggeria spread to Belgium and to the neighbouring Megumia terrane, migrating later (mid‐late Tremadocian) to Baltica, Southern Urals, Kazakhstanian terranes, Perunica and the Central Andean Basin. By the late Floian/early Dapingian, Broeggeria colonized palaeoequatorial deep shelves (Spitsbergen). Copyright © 2017 John Wiley & Sons, Ltd.

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Cambrian-Ordovician Rocks Adjacent to Hinlopenstretet, North Ny Friesland, Spitsbergen

Cited by 59 publications

References 0 publications

Diversity fluctuations and biogeography of Ordovician brachiopod faunas in northeastern Spitsbergen

Diversity fluctuations and biogeography of Ordovician brachiopod faunas in northeastern Spitsbergen

Lower Ordovician Trilobites of the Kirtonryggen Formation, Spitsbergen

BroeggeriaWalcott and other upper Cambrian and Tremadocian linguloid brachiopods from NW Argentina

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