The Trias and its ammonoids : the evolution of a time scale

Tozer, E. T.

doi:10.4095/119548

Cited by 53 publications

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“…The Balaton Highland is among the most important reference areas of the Tethyan Triassic stratigraphy (see Tozer 1984). Although this hilly terrain lacks the spectacular exposures and the Triassic sequences are far from being well-exposed, scattered and transient outcrops have yielded plenty of fossils, systematically collected over the past 150 years.…”

Section: Introductionmentioning

confidence: 99%

Local versus global effects on changes of fossil diversity: paleoenvironmental interpretation of Triassic faunas of the Balaton Highland (Hungary)

Vörös¹

2009

Central European Geology

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Section: Introductionmentioning

confidence: 99%

Local versus global effects on changes of fossil diversity: paleoenvironmental interpretation of Triassic faunas of the Balaton Highland (Hungary)

Vörös¹

2009

Central European Geology

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“…An obvious paleolatitudinal control existed on the distribution of different Upper Triassic ammonoid and monotid faunas from different segments of the North American cratonic margin and the Western Cordillera (Westermann 1973;Nichols and Silberling 1979;Tozer 1980cTozer , 1982aTozer , 1984Silberling 1985;Silberling et al 1997). Various fossil biotas give precious insight into the Upper Triassic marine biogeography of the continental shelf along the western margin of the North American craton, much of which was subsequently obscured by the complex accretionary tectonics of Triassic terranes (e.g .…”

Section: Pacific Margins Of North and South Americamentioning

confidence: 99%

“…Westermann 1973;Tozer 1970Tozer , 1971Tozer , 1982aTozer , 1984Tozer , 1994aStanley 1982;Newton 1988;Silberling 1985). The ammonoids and monotid bivalves are the most investigated among the biogeographically significant biotas for the Late Triassic paleogeography of the Cordilleran accreted terranes (Tozer 1982a(Tozer , 1994aSilberling 1985;Silberling et al 1997).…”

Section: First Record Of Rhabdoceras Suessi (Ammonoidea) From the Tramentioning

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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“…trIAssIc PerIod Tozer (1967Tozer ( ,1984 Kummel (1968) made some corrections of the Scythian ammonoid described by Welter (1922) and Wanner (1911) from Timor. According to Kummel, the presence of Scythian in Timor is indicated by (Harland et al, 1989, part) (Hasibuan, 1991).…”

Section: Previous Studiesmentioning

confidence: 99%

The Triassic Marine Biota of Eastern Indonesia and its Interregional and Global Correlation: A Review

Hasibuan¹

2010

Indonesian J. Geosci.

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The Trias and its ammonoids : the evolution of a time scale

Cited by 53 publications

References 0 publications

Local versus global effects on changes of fossil diversity: paleoenvironmental interpretation of Triassic faunas of the Balaton Highland (Hungary)

Local versus global effects on changes of fossil diversity: paleoenvironmental interpretation of Triassic faunas of the Balaton Highland (Hungary)

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

The Triassic Marine Biota of Eastern Indonesia and its Interregional and Global Correlation: A Review

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