Early Triassic conodonts and carbonate carbon isotope record of the Idrija–Žiri area, Slovenia

Chen, Yanlong; Kolar‐Jurkovšek, Tea; Jurkovšek, Bogdan; Aljinović, Dunja; Richoz, Sylvain

doi:10.1016/j.palaeo.2015.12.013

Cited by 37 publications

(34 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6). This first peak is correlated with an isotope peak that occurs around the Induan/ Olenekian boundary and has been recognized from a number of different regions (Payne et al 2004;Horacek et al 2007Horacek et al , 2009Grasby et al 2013;Chen et al 2016). A second positive excursion with a peak of þ1.7% occurs 18 m above the base of the Myophoria Beds Member (Fig.…”

Section: Carbonate Carbon Isotopesmentioning

confidence: 63%

Paleoecological Analysis of Benthic Recovery After the Late Permian Mass Extinction Event in Eastern Lombardy, Italy

Foster

Danise

Price

et al. 2018

Palaios

View full text Add to dashboard Cite

The late Permian mass extinction was the most severe biotic crisis of the Phanerozoic, with associated environmental changes that included the expansion of hypoxic and anoxic conditions in shallow shelf settings. It has been hypothesized that wave aeration promoted oxygen transport to the seafloor providing a 'habitable zone' in the shallowest marine environments that allowed the survival and rapid recovery of benthic invertebrates during the Early Triassic. We test this hypothesis by studying the rock and fossil records of the Lower Triassic Servino Formation, Italy. We also provide the first d 13 C carb isotope curve, and present new occurrence data of stratigraphically important fossils (i.e., cf. Tirolites cassianus), to improve the stratigraphic framework of the Servino Formation. The low-diversity fossil assemblages of the Servino Formation have similar compositions to other western Paleotethyan localities. Facies analysis demonstrates that benthic invertebrates were restricted to waveaerated settings, supporting the proposed 'habitable zone' hypothesis. However, there is no evidence for rapid recovery in the 'habitable zone' prior to the Spathian, which may indicate additional environmental stresses. In the lower Spathian Myophoria Beds Member, an increase in taxonomic and functional richness, the appearance of stenohaline, erect taxa, significant turnover, and increased heterogeneity in the composition of benthic assemblages indicate significant benthic recovery, which is attributed to reduced environmental stress. Prior to the late Spathian ''Upper Member'', bioturbation is poorly developed and restricted to only a few thin horizons, but in the ''Upper Member'' the intensity of bioturbation and proportion of bioturbated rock increase. This change can be attributed to climatic cooling and a related decrease in environmental stress. This upper Spathian recovery pulse can now be traced across the western Paleotethys, in both nearshore and deep offshore (below wave base) settings.

show abstract

Section: Carbonate Carbon Isotopesmentioning

confidence: 63%

Paleoecological Analysis of Benthic Recovery After the Late Permian Mass Extinction Event in Eastern Lombardy, Italy

Foster

Danise

Price

et al. 2018

Palaios

View full text Add to dashboard Cite

show abstract

“…The age of this genus remains unclear due to the rarity of acquired materials. In South China, the genus was aged to the Early Induan due to its association with Hindeodus post parvus (Yang et al, 2014), whereas in Slovenian, it was aged to the Early Olenekian, although other accompanying species were not observed (Chen et al, 2016). The current research shows that the specimens of this genus could co-occur either with Hindeodus cf.…”

Section: Induan To Early Olenekian Conodont Fauna Of the Early Triassicmentioning

confidence: 60%

“…It was found in Induan strata in Sichuan Province, South China, by Yang et al (2014), who described Parafurnishius as a new genus, with Parafurnishius xuanhanensis being its type species. Similar specimens were discovered in the Idrija-Ziri area of Slovenia, although they were designated as another genus Platyvil losus, with two species Platyvillosus corniger and Platyvillosus regularis discriminated (Chen et al, 2016). The specimens from South China and Slovenia share common characteristics with those of Platyvillosus because of their broad platform, although they are obviously different from the latter because of the highly developed tall denticles on the oral side.…”

Section: Induan To Early Olenekian Conodont Fauna Of the Early Triassicmentioning

confidence: 64%

New biostratigraphic evidence of Late Permian to Late Triassic deposits from Central Tibet and their paleogeographic implications

Liao

et al. 2019

Lithosphere

View full text Add to dashboard Cite

Triassic deposits in the Bangong-Nujiang Suture Zone are important for understanding its tectonic nature and evolutionary history, but have not been systematically studied due to a lack of biostratigraphic data. For a long time, the Upper Triassic Quehala Group featuring clasolite has been regarded as the only rocky unit. In recent years, the silicite-dominated Gajia Formation that bears radiolarian fossils was suggested to represent Ladinian to Carnian deposits. The Upper Permian and Lower Triassic rocks have never been excavated and thus are considered to be absent. This research, however, reveals that fossils aged from the Late Permian to Anisian of the Middle Triassic and Norian of the Late Triassic have been preserved in the central Bangong-Nujiang Suture Zone, which provides evidence of Upper Permian to early Middle Triassic deposits and provides new insights on the Upper Triassic strata as well. A new Triassic strata succession is thus proposed for the Bangong-Nujiang Suture Zone, and it demonstrates great similarities with those from Lhasa to the south and Qiangtang to the north. Therefore, we deduce that the Bangong-Nujiang Suture Zone was under a similar depositional setting as its two adjacent terranes, and it was likely a carbonate platform background because limestones were predominant across the Triassic. The newly acquired biostratigraphic data indicate that Lhasa and Qiangtang could not have been located on two separate continents with disparate sedimentary settings; therefore, the Bangong-Nujiang Suture Zone likely did not represent a large ocean between them. This conclusion is supported by lithostratigraphic and paleomagnetic research, which revealed that Lhasa and Qiangtang were positioned at low to middle latitudes during the Early Triassic. Combining this conclusion with fossil evidence, we suggest that the three main Tibetan terranes were in the same palaeobiogeographic division with South China, at least during the Latest Permian to Early Triassic. The Early Triassic conodont species Pachycladina obliqua is probably a fossil sign of middle to low latitudes in palaeogeography.

show abstract

“…Another conodont, Platyvillosus corniger Kolar-Jurkovšek and Chen in Chen et al, 2016, is very similar to this species, but is of Olenekian age. It is found in Spathian strata at Žiri-sortirnica 28 Section, in the Idrija–Žiri area of Slovenia (Chen et al, 2016) and Olenekian strata in Mokrice locality, eastern Slovenia (Kolar-Jurkovšek and Jurkovšek, 2015; Kolar-Jurkovšek et al, 2017).…”

Section: Systematic Paleontologymentioning

confidence: 84%

“…It is found in Spathian strata at Žiri-sortirnica 28 Section, in the Idrija–Žiri area of Slovenia (Chen et al, 2016) and Olenekian strata in Mokrice locality, eastern Slovenia (Kolar-Jurkovšek and Jurkovšek, 2015; Kolar-Jurkovšek et al, 2017). Although Kolar-Jurkovšek et al (2017) have highlighted the subtle morphological differences (Chen et al, 2016; Kolar-Jurkovšek et al, 2017), it is still difficult to distinguish these two species with specimens from the Yiwagou Section although they probably have different apparatuses (Yang et al, 2014; Kolar-Jurkovšek et al, 2017). Here we assign them to Pa .…”

Section: Systematic Paleontologymentioning

confidence: 99%

Smithian platform-bearing gondolellid conodonts from Yiwagou Section, northwestern China and implications for their geographic distribution in the Early Triassic

Li¹,

Jiang

Chen

et al. 2019

J. Paleontol.

Self Cite

View full text Add to dashboard Cite

Abundant platform-bearing gondolellid conodonts, including Scythogondolella mosheri (Kozur and Mostler), Sc. phryna Orchard and Zonneveld, and Sc. cf. milleri (Müller), have been discovered from the Yiwagou Section of Tewo, together with Novispathodus waageni waageni (Sweet) and Nv. w. eowaageni Zhao and Orchard. This is the first report of Smithian platform-bearing gondolellids from the Paleo-Tethys region. In addition, Eurygnathodus costatus Staesche, E. hamadai (Koike), Parafurnishius xuanhanensis Yang et al., and the genera Pachycladina Staesche, Parachirognathus Clark, and Hadrodontina Staesche have also been recovered from Dienerian to Smithian strata at Yiwagou Section. Three conodont zones are established, in ascending order: Eurygnathodus costatus-E. hamadai Assemblage Zone, Novispathodus waageni-Scythogondolella mosheri Assemblage Zone, and the Pachycladina-Parachirognathus Assemblage Zone.The platform-bearing gondolellids were globally distributed just after the end-Permian mass extinction, but the formerly abundant Clarkina Kozur disappeared in the late Griesbachian. Platform-bearing gondolellids dramatically decreased to a minimum of diversity and extent in the Dienerian before recovering in the Smithian. Scythogondolella Kozur, probably a thermophilic and eurythermic genus, lived in all latitudes at this time whereas other genera did not cope with Smithian high temperatures and so became restricted to the high-latitude regions. However, the maximum temperature in the late Smithian likely caused the extinction of almost all platform-bearing gondolellids. Finally, the group returned to equatorial regions and achieved global distribution again in the cooler conditions of the late Spathian. We conclude that temperature (and to a lesser extent oxygen levels) exerted a strong control on the geographical distribution and evolution of platform-bearing gondolellids in the Early Triassic.

show abstract

Early Triassic conodonts and carbonate carbon isotope record of the Idrija–Žiri area, Slovenia

Cited by 37 publications

References 32 publications

Paleoecological Analysis of Benthic Recovery After the Late Permian Mass Extinction Event in Eastern Lombardy, Italy

Paleoecological Analysis of Benthic Recovery After the Late Permian Mass Extinction Event in Eastern Lombardy, Italy

New biostratigraphic evidence of Late Permian to Late Triassic deposits from Central Tibet and their paleogeographic implications

Smithian platform-bearing gondolellid conodonts from Yiwagou Section, northwestern China and implications for their geographic distribution in the Early Triassic

Contact Info

Product

Resources

About