New constraints on the End-Triassic (Upper Norian–Rhaetian) magnetostratigraphy

Gallet, Yves; Krystyn, Leopold; Marcoux, Jean; Besse, J.

doi:10.1016/j.epsl.2007.01.004

Cited by 56 publications

(67 citation statements)

References 21 publications

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“…The~9 m thick Steinbergkogel STKB + C section from Austria, containing toward its base the presumed first appearance of M. posthernsteini, bears largely reverse magnetic polarity and shows little magnetostratigraphic resemblance with the nearby~4 m thick Steinbergkogel STK-A section, a candidate GSSP for the base of the Rhaetian (defined by the first appearance of M. posthernsteini; Krystyn et al, 2007a). In the~30 m thick Oyuklu section from Turkey (Gallet et al, 2007), M. posthernsteini occurs broadly from the (faulted) section base to section top across strata dominated by normal magnetic polarity showing little visual matching with the presumably coeval Steinbergkogel STKB+ C section of mainly reverse polarity. In summary, there is no unique magnetostratigraphic correlation between the supposedly coeval but highly condensed Steinbergkogel STKB + C, Steinbergkogel STK-A, and Oyuklu sections (contra Krystyn et al, 2007b), or between Oyuklu and Pizzo Mondello (contra Gallet et al, 2007), or between Steinbergkogel or Oyuklu and the Brumano and Italcementi Quarry sections of this study, suggesting that these very thin and evidently highly condensed sections have significant cryptic internal hiatuses.…”

Section: The Norian-rhaetian Boundary and The Duration Of The Rhaetiamentioning

confidence: 99%

“…Short duration vs. long duration options for the Rhaetian, the youngest stage of the Triassic. According to the compilation of magneto-biostratigraphic data from the Tethyan realm of Krystyn et al (2002) and Gallet et al (2003) (Tethyan composite I), and recent data from Oyuklu (Gallet et al, 2007), the Rhaetian is~2 Myr in duration and in part missing in a supposed gap in the Newark APTS . According to data from Pizzo Mondello , the Rhaetian should be~6-7 Myr long, virtually similar in duration to the original estimate of Kent and Olsen (1999).…”

Section: Introductionmentioning

confidence: 99%

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Rhaetian magneto-biostratigraphy from the Southern Alps (Italy): Constraints on Triassic chronology

Muttoni

Kent

Jadoul

et al. 2010

Palaeogeography, Palaeoclimatology, Palaeoecology

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New Late Triassic-earliest Jurassic magneto-biostratigraphic data have been obtained from three overlapping sections in the Southern Alps, Italy (Costa Imagna, Brumano, Italcementi Quarry), composed of~520 m of shallow-marine carbonates outcropping in stratigraphic continuity. Characteristic magnetic components of presumed depositional age record a sequence of 9 normal and reverse polarity magnetozones (as defined by at least three stratigraphically superposed samples) linked by conodont and palynofloral evidence from this study and the literature to Rhaetian to Triassic-Jurassic boundary age. This represents a significantly larger number of polarity zones than previously recognized in more condensed Rhaetian sections from the literature, and by inference represents more time. These data are placed in a broader Late Triassic temporal framework by means of correlations to published magneto-biostratigraphic data from the Tethyan marine Pizzo Mondello section and the Newark astronomical polarity time scale (APTS). This framework is consistent with a position of the Norian-Rhaetian boundary (as defined at Brumano and Pizzo Mondello by the first appearance of Misikella posthernsteini) within Newark magnetozones E17r-E19r in the~207-210 Ma time interval, in basic agreement with the position originally estimated in the Newark using pollen biostratigraphy (E18 at 208-209 Ma). This framework is also consistent with the position of the TriassicJurassic boundary interval (placed at Italcementi Quarry at the acme of Kraeuselisporites reissingeri coincident with a negative carbon isotope excursion) correlative to just above Newark magnetozone E23r and just below the oldest CAMP lavas dated at~202 Ma. Hence, we estimate the duration of the Rhaetian to be~5.5-8.5 Myr (or even longer if the Triassic-Jurassic boundary is instead placed above the negative carbon isotope excursion as at Kuhjoch, which is the designated GSSP for the base of the Hettangian), and encompassing 9 magnetozones. This duration contrasts with a duration of~2 Myr and only~4 magnetozones in several alternative published magneto-biostratigraphic schemes.

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Section: The Norian-rhaetian Boundary and The Duration Of The Rhaetiamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rhaetian magneto-biostratigraphy from the Southern Alps (Italy): Constraints on Triassic chronology

Muttoni

Kent

Jadoul

et al. 2010

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…5, column 5). In this case, the Sevatian 2 becomes the Lower Rhaetian, in opposition with the former usage of the Sevatian 1 and 2 as lower and upper substages for the Upper Norian, having as index fossils Sagenites quinquepunctatus and Sagenites reticulatus and/or Paracochloceras suessi, respectively (Gallet et al , 2003(Gallet et al , 2007.…”

Section: Biostratigraphic Range and Chronostratigraphic Relevancementioning

confidence: 99%

“…Krystyn 1988, Golebiowski 19905. Krystyn and Kuerschner 2005, Krystyn et al 2007a-b, Krystyn 2008a-b, Krystyn et al 2009, Maslo 2006, Muttoni et al 2010 two-faced creature", i.e. a Rhaetian sensu lato classically defined in terms of the Alpine Kössen stratotype, and a Rhaetian sensu stricto that is chronostratigraphically defined by the Choristoceras marshi Zone (sensu Tozer 1974, p. 203), which is the upper part of the Kössen.…”

Section: E Gràdinaru E S Sobolev Central European Geology 53 201mentioning

confidence: 99%

First record ofRhabdoceras suessi(Ammonoidea, Late Triassic) from the Transylvanian Triassic Series of the Eastern Carpathians (Romania) and a review of its biochronology, paleobiogeography and paleoecology

Grădinaru¹,

Sobolev²

2010

Central European Geology

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The occurrence of the heteromorphic ammonoid Rhabdoceras suessi Hauer, 1860, is recorded for the first time in the Upper Triassic limestone of the Timon-Ciungi olistolith in the Raràu Syncline, Eastern Carpathians. A single specimen of Rhabdoceras suessi co-occurs with Monotis (Monotis) salinaria that constrains its occurrence here to the Upper Norian (Sevatian 1). It is the only known heteromorphic ammonoid in the Upper Triassic of the Romanian Carpathians. Rhabdoceras suessi is a cosmopolitan species widely recorded in low and mid-paleolatitude faunas. It ranges from the Late Norian to the Rhaetian and is suitable for high-resolution worldwide correlations only when it co-occurs with shorter-ranging choristoceratids, monotid bivalves, or the hydrozoan Heterastridium. Formerly considered as the index fossil for the Upper Norian (Sevatian) Suessi Zone, by the latest 1970s this species lost its key biochronologic status among Late Triassic ammonoids, and it generated a controversy in the 1980s concerning the status of the Rhaetian stage. New stratigraphic data from North America and Europe in the subsequent decades resulted in a revised ammonoid biostratigraphy for the uppermost Triassic, the Rhaetian being reinstalled as the topmost stage in the current standard timescale of the Triassic. The geographic distribution of Rhabdoceras is compiled from published worldwide records, and its paleobiogeography and paleoecology are discussed. Central European Geology, Vol. 53/2-3, pp. 261-309 (2010) DOI: 10.1556/CEuGeol.53.2010 First While examining the fossils collected by the senior author in an old quarry in limestone of the Timon-Ciungi olistolith, the junior author, whose aim was to study the nautiloids, identified a fragment of a specimen of Rhabdoceras suessi Hauer, 1860, in the material. Consequently the purpose of the present paper is to describe this specimen, and to discuss the biostratigraphic range, chronostratigraphic relevance, and the paleobiogeographic distribution and paleoecology of this Late Triassic heteromorphic ammonoid. Geologic and stratigraphic settingsThe Timon-Ciungi olistolith, along with many other olistoliths composed of Triassic sedimentary and/or ophiolitic rocks, is embedded in Lower Cretaceous wildflysch that infills the Raràu Syncline of the Bucovinian Nappe in the northern part of the inner Eastern Carpathians (Sàndulescu 1973). The Triassic rocks of the olistoliths and also of several large klippen scattered along the inner zone of the Eastern Carpathians, in the Raràu, Hàghimaş and Perşani Mts, are assigned to several, facially distinctive Transylvanian Triassic Series (Patrulius 1996).The Timon-Ciungi olistolith is located on the left side of the drainage of the Timon Creek, which is a tributary of the Moldova River at the Fundu Moldovei locality (Fig. 1). The olistolith, several tens of meters in length, was largely quarried in the 1960s. The limestone quarry was abandoned for a long time and the area is now entirely reforested, with only few small exposures remaining. The main m...

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“…The section is dated based on conodonts, ammonoids, and halobiids (Lukeneder et al 2012;Lukeneder & Lukeneder 2014). A detailed age assignment follows Krystyn et al (2002) and Gallet et al (2007). The strata dip approximmately 50° towards the Northeast.…”

Section: Lithology and Faciesmentioning

confidence: 99%

Taphonomic implications from Upper Triassic mass flow deposits: 2-dimensional reconstructions of an ammonoid mass occurrence (Carnian, Taurus Mountains, Turkey)

Mayrhofer¹

2014

Geologica Carpathica

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Ammonoid mass occurrences of Late Triassic age were investigated in sections from A şağlyaylabel and Yukarlyaylabel, which are located in the Taurus Platform-Units of eastern Turkey. The cephalopod beds are almost monospecific, with > 99.9 % of individuals from the ceratitic genus Kasimlarceltites, which comprises more than hundreds of millions of ammonoid specimens. The ontogenetic composition of the event fauna varies from bed to bed, suggesting that these redeposited shell-rich sediments had different source areas. The geographical extent of the mass occurrence can be traced over large areas up to 10 km2. Each of the Early Carnian (Julian 2) ammonoid mass occurrences signifies a single storm (e.g. storm-wave action) or tectonic event (e.g. earthquake) that caused gravity flows and turbidity currents. Three types of ammonoid accumulation deposits are distinguished by their genesis: 1) matrix-supported floatstones, produced by low density debris flows, 2) mixed floatstones and packstones formed by high density debris flows, and 3) densely ammonoid shell-supported packstones which result from turbidity currents. Two-dimensional calculations on the mass occurrences, based on sectioning, reveal aligned ammonoid shells, implying transport in a diluted sediment. The ammonoid shells are predominantely redeposited, preserved as mixed autochthonous/parautochnonous/ allochthonous communities based on biogenic and sedimentological concentration mechanisms ( = in-situ or post-mortem deposited). This taphonomic evaluation of the Kasimlarceltites beds thus reveals new insights into the environment of deposition of the Carnian section, namely that it had a proximal position along a carbonate platform edge that was influenced by a nearby shallow water regime. The Kasimlarceltites-abundance zone is a marker-zone in the study area, developed during the drowning of a shallow water platform, which can be traceable over long distances.

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New constraints on the End-Triassic (Upper Norian–Rhaetian) magnetostratigraphy

Cited by 56 publications

References 21 publications

Rhaetian magneto-biostratigraphy from the Southern Alps (Italy): Constraints on Triassic chronology

Rhaetian magneto-biostratigraphy from the Southern Alps (Italy): Constraints on Triassic chronology

First record ofRhabdoceras suessi(Ammonoidea, Late Triassic) from the Transylvanian Triassic Series of the Eastern Carpathians (Romania) and a review of its biochronology, paleobiogeography and paleoecology

Taphonomic implications from Upper Triassic mass flow deposits: 2-dimensional reconstructions of an ammonoid mass occurrence (Carnian, Taurus Mountains, Turkey)

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