Aegean and Bithynian: Proposal for Two New Anisian Substages

Assereto, R.

doi:10.1007/978-3-7091-4497-8_2

Cited by 24 publications

(18 citation statements)

References 3 publications

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“…4 and 5.26). The base of the Bithynian substage is defined in its type area of the Kocaeli peninsula of Turkey by the first appearance of the ammonoid Nicomedites osmani (Assereto, 1974). There, the first occurrence of Ni.…”

Section: Aegean-bithynian Boundarymentioning

confidence: 99%

An integrated biostratigraphy (conodonts and foraminifers) and chronostratigraphy (paleomagnetic reversals, magnetic susceptibility, elemental chemistry, carbon isotopes and geochronology) for the Permian–Upper Triassic strata of Guandao section, Nanpanjiang Basin, south China

Lehrmann

Stepchinski

Altıner

et al. 2015

Journal of Asian Earth Sciences

108

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a b s t r a c tThe chronostratigraphy of Guandao section has served as the foundation for numerous studies of the end-Permian extinction and biotic recovery in south China. Guandao section is continuous from the Permian-Triassic boundary to the Upper Triassic.Conodonts enable broad delineation of stage and substage boundaries and calibration of foraminifer biostratigraphy as follows. Changhsingian-Griesbachian: first Hindeodus parvus, and first appearance of foraminifers Postcladella kalhori and Earlandia sp. Griesbachian-Dienerian: first Neospathodus dieneri, and last appearance of foraminifer P. grandis. Dienerian-Smithian: first Novispathodus waageni and late Dienerian first appearance of foraminifer Hoyenella ex gr. sinensis. Smithian-Spathian: first Nv? crassatus and last appearance of foraminifers Arenovidalina n. sp. and Glomospirella cf. vulgaris. Spathian-Aegean: first Chiosella timorensis and first appearance of foraminifer Meandrospira dinarica. Aegean-Bithynian: first Nicoraella germanica and first appearance of foraminifer Pilammina densa. Bithynian-Pelsonian: after last Neogondolella regalis, prior to first Paragondolella bulgarica and first appearance of foraminifer Aulotortus eotriasicus. Pelsonian-Illyrian: first Pg. excelsa and last appearance of foraminifers Meandrospira? deformata and Pilamminella grandis. Illyrian-Fassanian: first Budurovignathus truempyi, and first appearance of foraminifers Abriolina mediterranea and Paleolituonella meridionalis. FassanianLongobardian: first Bv. mungoensis and last appearance of foraminifer A. mediterranea. Longobardian-C ordevolian: first Quadralella polygnathiformis and last appearance of foraminifers Turriglomina mesotriasica and Endotriadella wirzi.The section contains primary magnetic signature with frequent reversals occurring around the Permian-Triassic, Olenekian-Anisian, and Anisian-Ladinian boundaries. Predominantly normal polarity occurs in the lower Smithian, Bithynian, and Longobardian-Cordevolian. Predominantly reversed polarity occurs in the upper Griesbachian, Induan-Olenekian, Pelsonian and lower Illyrian. Reversals match well with the GPTS. Large amplitude carbon isotope excursions, attaining values as low as À2.9‰ d 13 C and high as +5.7‰ d 13 C, characterize the Lower Triassic and basal Anisian. Values stabilize around +2‰ d 13 C through the Anisian to Carnian. Similar signatures have been reported globally. Magnetic susceptibility and synthetic gamma ray logs show large fluctuations in the Lower Triassic and an overall decline in magnitude of fluctuation through the Middle and Upper Triassic. The largest spikes in magnetic susceptibility and gamma ray, indicating greater terrestrial lithogenic flux, correspond to positive d 13 C excursions. High precision U-Pb analysis of zircons from volcanic ash beds provide a robust age of 247.28 ± 0.12 Ma for the Olenekian-Anisian boundary at Guandao and an age of 251.985 ± 0.097 Ma for the Permian-Triassic boundary at Taiping. Together, the new U-Pb geochronology from the Guandao and Taiping sectio...

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Section: Aegean-bithynian Boundarymentioning

confidence: 99%

An integrated biostratigraphy (conodonts and foraminifers) and chronostratigraphy (paleomagnetic reversals, magnetic susceptibility, elemental chemistry, carbon isotopes and geochronology) for the Permian–Upper Triassic strata of Guandao section, Nanpanjiang Basin, south China

Lehrmann

Stepchinski

Altıner

et al. 2015

Journal of Asian Earth Sciences

108

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“…Spathian faunas are also documented in Hallstatt facies of Albania and Chios island in the Aegean Sea (Arthaber 1911;Renz & Renz 1948;Kummel 1969;Germani 1997;Mertmann & Jacobshagen 2003). Ammonoid assemblages from the Aegean Islands (particularly Chios) and coastal Turkey provided the basis for subdivision of the lower part of the Anisian into Aegean and Bithynian substages by Assereto (1974).…”

Section: Triassic Ammonoid Recordmentioning

confidence: 99%

“…Nicomedites, Hollandites, Anagymnotoceras; Fig. 14), Ptychitidae, and Acrochordiceratidae (Assereto 1974;Bucher 1988Bucher , 1992a.…”

Section: Ammonoid Provinces and Biotic Eventsmentioning

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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“…Pialliiza tetkydis gen. et sp.nov. occurs in the clayey limestone beds intercalated within mark containing Halobia (H. bifhyiZicU); the sequence is referred by several authors to the Carnian (Assereto, 1972(Assereto, , 1974Ozdemir e f al., 1973;Nicora & Premoli Silva, 1976;Nicora, 1977;Dager, 1977Dager, , 1978a, to the Carnian excluding the Early part (Zaninetti & Dager, 1978) or to the Upper Carnian (Yurttas- Ozdemir, 1971Ozdemir, ,1972Ozdemir, ,1973Gedik, 1975 Consisting of a short early stage in the form of a low trochoid (or streptospiral?) coil; second stage triserial, short, followed by a trochospiral stage, slightly contorted, with an indefinite number of chambers per whorl (probably not more than five) which reduces to three, possibly two, chambers per whorl in the final stage.…”

Section: The Lithostratigraphic Succession Of the Triassic Tepekoymentioning

confidence: 99%

<i>Piallina tethydis</i> gen. et sp.nov. (Foraminiferida) from the Triassic (Carnian) of the Kocaeli Peninsula, Turkey

Rettori¹,

Zaninetti²,

Martini³

et al. 1993

J. Micropalaeontol.

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Aegean and Bithynian: Proposal for Two New Anisian Substages

Cited by 24 publications

References 3 publications

An integrated biostratigraphy (conodonts and foraminifers) and chronostratigraphy (paleomagnetic reversals, magnetic susceptibility, elemental chemistry, carbon isotopes and geochronology) for the Permian–Upper Triassic strata of Guandao section, Nanpanjiang Basin, south China

An integrated biostratigraphy (conodonts and foraminifers) and chronostratigraphy (paleomagnetic reversals, magnetic susceptibility, elemental chemistry, carbon isotopes and geochronology) for the Permian–Upper Triassic strata of Guandao section, Nanpanjiang Basin, south China

Triassic ammonoid biostratigraphy: an overview

<i>Piallina tethydis</i> gen. et sp.nov. (Foraminiferida) from the Triassic (Carnian) of the Kocaeli Peninsula, Turkey

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Aegean and Bithynian: Proposal for Two New Anisian Substages

Cited by 24 publications

References 3 publications

An integrated biostratigraphy (conodonts and foraminifers) and chronostratigraphy (paleomagnetic reversals, magnetic susceptibility, elemental chemistry, carbon isotopes and geochronology) for the Permian–Upper Triassic strata of Guandao section, Nanpanjiang Basin, south China

An integrated biostratigraphy (conodonts and foraminifers) and chronostratigraphy (paleomagnetic reversals, magnetic susceptibility, elemental chemistry, carbon isotopes and geochronology) for the Permian–Upper Triassic strata of Guandao section, Nanpanjiang Basin, south China

Triassic ammonoid biostratigraphy: an overview

&lt;i&gt;Piallina tethydis&lt;/i&gt; gen. et sp.nov. (Foraminiferida) from the Triassic (Carnian) of the Kocaeli Peninsula, Turkey

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<i>Piallina tethydis</i> gen. et sp.nov. (Foraminiferida) from the Triassic (Carnian) of the Kocaeli Peninsula, Turkey