The Global Boundary Stratotype Section and Point (GSSP) of the Carnian Stage (Late Triassic) at Prati di Stuores/Stuores Wiesen Section (Southern Alps, NE Italy)

Mietto, Paolo; Manfrin, Stefano; Preto, Nereo; Rigo, Manuel; Roghi, Guido; Furin, Stefano; Gianolla, Piero; Posenato, Renato; Muttoni, Giovanni; Nicora, Alda; Buratti, Nicoletta; Cirilli, Simonetta; Spötl, Christoph; Ramezani, Jahandar; Bowring, Samuel A.

doi:10.18814/epiiugs/2012/v35i3/003

Cited by 90 publications

(55 citation statements)

References 66 publications

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“…The lower part of these sediments covers the presumably irregular top surface of the underlying basalt stack (Brandner et al 2007). Mietto et al (2012) named these sediments the 'Frommer Member' of the Fernazza Formation, whereas Brandner et al (2007) merged it with the lithologically similar Wengen Formation. Along Frommerbach, the lowermost few metres of the turbiditic beds above the basalt top also consist of coarse Pietra Verde-like sandstone layers.…”

Section: Seiser Alm and Grohmann Sectionmentioning

confidence: 99%

“…The tectonic settings proposed for this magmatic activity range from rifting to large-scale strike-slip and subduction scenarios (see Abbas et al 2018 for a recent summary). Available U-Pb zircon ages and biochronological constraints from the Southern Alps (Brack et al 2007 and references cited therein; Mietto et al 2012) suggest that the duration of the main magmatic interval was short (<6 myr, from c. 243.3 to 237.77 Ma).…”

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confidence: 99%

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Timing and evolution of Middle Triassic magmatism in the Southern Alps (northern Italy)

Storck

Brack

Wotzlaw

et al. 2018

JGS

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Middle Triassic magmatism in the Southern Alps (northern Italy) consists of widespread volcanoclastic deposits, basaltic lava flows and intrusive complexes. Despite their importance in understanding the geodynamic evolution of the westernmost Tethys, the timing of magmatic activity and the links between the different igneous products remain poorly understood. We present a comprehensive high-precision zircon U-Pb geochronology dataset for the major intrusive complexes and several volcanic ash layers and integrate this with a high-resolution stratigraphic framework of Middle Triassic volcanosedimentary successions. The main interval of Middle Triassic magmatism lasted at least 5.07 ± 0.06 myr. Magmatic activity started with silicic eruptions between 242.653 ± 0.036 and 238.646 ± 0.037 Ma, followed by a <1 myr eruptive interval of voluminous basaltic lava flows. Coeval mafic to intermediate intrusions dated at 238.190 ± 0.055 to 238.075 ± 0.087 Ma may represent feeder and subvolcanic complexes related to the basalt flows. The youngest products are silicic tuffs from latest Ladinian to early Carnian sequences dated at 237.680 ± 0.047 and 237.579 ± 0.042 Ma. Complemented by zircon trace element data, our high-resolution temporal framework places tight constraints on the link between silicic and mafic igneous products in a complex geodynamic setting. Supplementary material: Isotope dilution thermal ionization mass spectrometry U-Pb and laser ablation inductively coupled plasma mass spectrometry trace element data tables, sample coordinates, supplementary geochemical data, cathodoluminescence images of isotope dilution thermal ionization mass spectrometry dated zircons and supplementary field documentation are available at

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Section: Seiser Alm and Grohmann Sectionmentioning

confidence: 99%

mentioning

confidence: 99%

Timing and evolution of Middle Triassic magmatism in the Southern Alps (northern Italy)

Storck

Brack

Wotzlaw

et al. 2018

JGS

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“…Brack et al. 2005; Mietto et al. 2007), for most of the Upper Triassic (Tuvalian–upper Carnian to Rhaetian) ammonoids are rare, lacking the high degree of correlation potential required for global correlations.…”

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confidence: 99%

New biostratigraphical constraints for the Norian/Rhaetian boundary: data from Lagonegro Basin, Southern Apennines, Italy

Giordano

Rigo

Ciarapica

et al. 2010

LET

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Four stratigraphic sections belonging to Lagonegro succession (Southern Apennines) at Mt S. Enoc, Pignola-Abriola, Sasso di Castalda and Mt Volturino have been studied in detail under to provide a new micro-palaeontological data set based on conodonts and radiolarians for the characterization of the Norian⁄Rhaetian interval. The studied sec- tions represent the different settings of the Lagonegro Basin (from proximal to distal facies) and permit a detailed, integrated, biostratigraphy of the Calcari con Selce (cherty limestones) and Scisti Silicei formations (bedded cherts with radiolarians) to be drawn up. The upper portion of the Calcari con Selce Formation, exhibits intermediate charac- teristics between the Calcari con Selce and Scisti Silicei Formation, in particular the pro- gressive decrease in carbonate content against an increase in shales and cherts. Within the four sections studied, the Norian ⁄ Rhaetian interval has been documented both with conodonts and radiolarians. Because of the continuity and the absence of condensed facies, it has been possible to recognize the morphocline between species Misikella hern- steini and Misikella posthernsteini, here represented by all the transitional forms charac- terized by common features between the two species, gathered in three evolutionary steps. Moreover, the morphocline between M. hernsteini and M. posthernsteini has been involved in the definition of the Norian ⁄ Rhaetian Boundary, recognizing thus the FAD of M. posthernsteini, one of the possible biomarkers proposed for the boundary. The rich, well-preserved, radiolarian associations of Pignola-Abriola, Sasso di Castalda and Mt Volturino permit the correlation of Tethyan and American conodont successions, high- lighting the importance of the mostly coincident occurrences of M. posthernsteini and Epigondolella mosheri morphotype A, which correspond to the base of Proparvicingula moniliformis A. Z. and the disappearance of bivalve Monotis. These coincident bioevents are used here to define the base of the Rhaetian stage

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“…13). The definition of the base of the Carnian as the LO of Daxatina canadensis (Mietto et al 2007b;Gaetani 2009) is one of two ammonoid datums used to define Triassic stage bases. The other well-established Carnian ammonoid biozonation is from British Columbia and was most recently reviewed by Tozer (1994) as Himavatites columbianus (l) lateral view, (m) ventral view.…”

Section: Ammonoid Zonesmentioning

confidence: 99%

Triassic ammonoid biostratigraphy: an overview

Balini

Lucas

Jenks³

et al. 2010

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The Triassic chronostratigraphic scale was built on two centuries of research on ammonoid biostratigraphy and biochronology. Two Triassic stage bases and all of the Triassic substages are currently defined by ammonoid bioevents. The study of Triassic ammonoids began during the late 1700s, and in 1895, Edmund von Mojsisovics, Wilhelm Waagen and Carl Diener published an essentially complete Triassic chronostratigraphic scale based on ammonoid biostratigraphy. This scale introduced many of the Triassic stage and substage names still used today, and all terminology of stages and substages subsequently introduced has been based on ammonoid biostratigraphy. Early Triassic ammonoids show a trend from cosmopolitanism (Induan) to latitudinal differentiation (Olenekian), and the four Lower Triassic substage (Griesbachian, Dinerian, Smithian and Spathian) boundaries are globally correlated by widespread ammonoid biotic events. Middle Triassic ammonoids have provinciality similar to that of the Olenekian and provide a basis for recognizing six Middle Triassic substages. Late Triassic ammonoids provide a basis for recognizing three stages divided into five substages. The main uncertainty for the future of Triassic ammonoid biostratigraphy is not the decline of the ammonoids as a tool for dating and correlation of Triassic strata but, rather, the dramatic decrease in the number of specialists, due to the lack of replacement of experienced palaeontologists who started their activity in the 1950s and 1960s.

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The Global Boundary Stratotype Section and Point (GSSP) of the Carnian Stage (Late Triassic) at Prati di Stuores/Stuores Wiesen Section (Southern Alps, NE Italy)

Cited by 90 publications

References 66 publications

Timing and evolution of Middle Triassic magmatism in the Southern Alps (northern Italy)

Timing and evolution of Middle Triassic magmatism in the Southern Alps (northern Italy)

New biostratigraphical constraints for the Norian/Rhaetian boundary: data from Lagonegro Basin, Southern Apennines, Italy

Triassic ammonoid biostratigraphy: an overview

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