Discussion about Duration and Position of the Rhaetian Stage

Wiedmann, Jost; Fabricius, F.; Krystyn, Leopold; Reitner, Jürgen M.; Urlichs, Max

doi:10.1127/nos/8/1979/133

Cited by 22 publications

(8 citation statements)

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“…Being nearly uniform in size and shape, these calcispheres have close morphological similarity to Upper Triassic calcareous nannofossils described from the Alps (e.g. Wiedmann et al, 1979;Moshkovitz, 1982;Jafer, 1983;Posch and Stradner, 1987), Timor (Bown, 1992), off northwestern Australia (Bralower et al, 1991), and Queen Charlotte Islands in British Columbia (Bown, 1992). Their small size, globular forms, and irregular arrangement of calcite crystals of their shells are similar to incertae sedis calcareous nannofossil (Bown, 1998).…”

Section: Calcispheresmentioning

confidence: 86%

Depositional response to the Late Triassic ascent of calcareous plankton in pelagic mid-oceanic plate deposits of Japan

Onoue

Yoshida

2010

Journal of Asian Earth Sciences

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Section: Calcispheresmentioning

confidence: 86%

Depositional response to the Late Triassic ascent of calcareous plankton in pelagic mid-oceanic plate deposits of Japan

Onoue

Yoshida

2010

Journal of Asian Earth Sciences

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“…As mentioned above, the source of the lime-mud is possibly from calcareous nannoplankton. The very early evolutionary stage of nannoplankton has been reported from the Alpine areas of Austria and Germany, and the Mediterranean region (DiNocera & Scandone 1977;Wiedmann et al 1979;Moshkovitz 1982;Jafer 1983;Bellanca et al 1995). Carbon and oxygen isotopic analyses of the Late Triassic nannofossil assemblages of the Wombat Plateau, off northwestern Australia, indicate that they thrived in open-ocean conditions (Bralower et al 1991).…”

Section: Triassic To Jurassic Pelagic Sedimentation On Ocean Floormentioning

confidence: 95%

Triassic mid‐oceanic sedimentation in Panthalassa Ocean: Sambosan accretionary complex, Japan

Onoue¹,

Sano

2007

Island Arc

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The Sambosan accretionary complex of southwest Japan was formed during the uppermost Jurassic to lowermost Cretaceous and consists of basaltic rocks, carbonates and siliceous rocks. The Sambosan oceanic rocks were grouped into four stratigraphic successions: (i) Middle Upper Triassic basaltic rock; (ii) Upper Triassic shallow‐water limestone; (iii) limestone breccia; and (iv) Middle Middle Triassic to lower Upper Jurassic siliceous rock successions. The basaltic rocks have a geochemical affinity with oceanic island basalt of a normal hotspot origin. The shallow‐water limestone, limestone breccia, and siliceous rock successions are interpreted to be sediments on the seamount‐top, upper seamount‐flank and surrounding ocean floor, respectively. Deposition of the radiolarian chert of the siliceous rock succession took place on the ocean floor in Late Anisian and continued until Middle Jurassic. Oceanic island basalt was erupted to form a seamount by an intraplate volcanism in Late Carnian. Late Triassic shallow‐water carbonate sedimentation occurred at the top of this seamount. Accumulation of the radiolarian chert was temporally replaced by Late Carnian to Early Norian deep‐water pelagic carbonate sedimentation. Biotic association and lithologic properties of the pelagic carbonates suggest that an enormous production and accumulation of calcareous planktonic biotas occurred in an open‐ocean realm of the Panthalassa Ocean in Late Carnian through Early Norian. Upper Norian ribbon chert of the siliceous rock succession contains thin beds of limestone breccia displaced from the shallow‐water buildup resting upon the seamount. The shallow‐water limestone and siliceous rock successions are nearly coeval with one another and are laterally linked by displaced carbonates in the siliceous rock succession.

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“…These data came not from the Hallstatt Limestone but from the time-equivalent Kössen and Zlambach beds. Wiedmann et al (1979) reported that Choristoceras marshi -an index fossil of the restricted Rhaetian -was found in the lower part of the Kössen Beds of the Lahnewiesgraben, equivalent to the former Rhabdoceras suessi Zone. Upon this discovery Wiedmann et al (1979, p. 142, tab. 2) made four proposals for defining the Alpine uppermost Triassic chronostratigraphy, none of them being later validated.…”

Section: Biostratigraphic Range and Chronostratigraphic Relevancementioning

confidence: 99%

“…On this subject the reader is referred to the papers by Pearson (1970), Tozer (1971Tozer ( , 1980bTozer ( -c, 1984Tozer ( , 1986Tozer ( , 1988Tozer ( , 1990Tozer ( , 19931994b), Wiedmann (1972), Kozur (1973), Wiedmann et al (1979), Gazdzicki et al (1979), Krystyn and Wiedmann (1986), Krystyn (1988Krystyn ( , 1990Krystyn ( , 2008b, Dagys and Dagys (1994), Krystyn and Kuerschner (2005), Krystyn et al (2007a-b).…”

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

confidence: 99%

“…To summarize the data of this period, in terms of the chronostratigraphic nomenclature applied to the North American zonal sequence, as promoted by Tozer (1967Tozer ( , 1970Tozer ( , 1971Tozer ( , 1974, which was also adopted in Europe by Krystyn (1973Krystyn ( , 1974Krystyn ( , 1980, Zapfe (1974), Tollmann (1976) and Wiedmann et al (1979), the occurrence of Rhabdoceras suessi was customarily confined to the Upper Norian (Sevatian) Suessi Zone, that in most chronostratigraphic schemes underlies the Rhaetian Marshi Zone (Fig.4).…”

Section: Biostratigraphic Range and Chronostratigraphic Relevancementioning

confidence: 99%

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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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Discussion about Duration and Position of the Rhaetian Stage

Cited by 22 publications

References 0 publications

Depositional response to the Late Triassic ascent of calcareous plankton in pelagic mid-oceanic plate deposits of Japan

Depositional response to the Late Triassic ascent of calcareous plankton in pelagic mid-oceanic plate deposits of Japan

Triassic mid‐oceanic sedimentation in Panthalassa Ocean: Sambosan accretionary complex, Japan

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

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