NDLI: Stratigraphy and conodonts of the Lower Carboniferous of the Shishkat section (southern Tien Shan, Tajikistan)

Content Provider	Springer Nature Link
Author	Bardasheva, Nina P. Bardashev, Igor A. Weddige, Karsten Ziegler, Willi
Copyright Year	2004
Abstract	The Shishkat section, on the northern slope of the Zeravshan range, with its continuous sequence from the middle Silurian up to the middle Carboniferous is unique in Central Asia because of its Devonian-/Carboniferous boundary deposits.The Carboniferous is represented by layered limestones in upper part of Surkhobi Formation and by massive limestones in Yura Formation. The study of the vertical conodont distribution has allowed to subdivide the deposits into the following conodont zones:praesulcata, sulcata, Lowerduplicata, Upperduplicata, sandbergi, Lowercrenulata, Uppercrenulata, typicus, anchoralis-latus, texanus, commutata, bilineatus and?nodosa. In the upper Yura Formation, the Middle Carboniferous conodontsDeclinognathodus sp.,Idiognathodus delicatus andIdiognathoides asiaticus occur. No conodont zone younger than the?nodosa Zone, however, could be recognized in the upper Yura Formation because of the poor conodont contents. The conodont zones are correlated with foraminifera zones which are established in the section.The following new taxa are described:Ctenopolygnathus jalilovi sp. nov.,Eucostapolygnathus lidiae sp. nov.,Laterignathus aristovi sp. nov.,Scaliognathus? chirkini sp. nov.,Siphonodella praeplana sp. nov.,Siphonodella wilberti sp. nov.Das Shishkat Profil, am Zeravshan-Nordabfall, mit seiner kontinuierlichen Folge vom mittleren Silur bis zum mittleren Karbon ist in Zentralasien einzigartig wegen seiner Devon-/Karbon-Grenzschichten.Das Karbon ist vertreten durch geschichtete Kalke in der oberen Surkhobi-Formation und massive Kalke in derYura-Formation. Die vertikale Conodontenverteilung zeigt folgende Conodontenzonen:praesulcata, sulcata, Untereduplicata, Obereduplicata, sandbergi, Unterecrenulata, Oberecrenulata, typicus, anchoralis-latus, texanus, commutata, bilineatus and?nodosa. In der oberen Yura-Formation kommen die mittelkarbonischen ConodontenDeclinognathodus sp.,Idiognathodus delicatus undIdiognathoides asiaticus vor. Allerdings gibt es in der oberen Yura-Formation kaum noch Conodonten, so dass keine Zone jünger als die?nodosa-Zone nachgewiesen werden konnte. Die Conodontenzonen werden mit Foraminiferenzonen korreliert, die im Profil vertreten sind.Folgende neue Taxa werden beschrieben:Ctenopolygnathus jalilovi sp. nov.,Eucostapolygnathus lidiae sp. nov.,Laterignathus aristovi sp. nov.,Scaliognathus? chirkini sp. nov.,Siphonodella praeplana sp. nov.,Siphonodella wilberti sp. nov.
Starting Page	225
Ending Page	301
Page Count	77
File Format	PDF
ISSN	00372110
Journal	Palaeobiodiversity and Palaeoenvironments
Volume Number	84
Issue Number	1-2
Language	English
Publisher	Springer-Verlag
Publisher Date	2004-01-01
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Paleontology Biodiversity Animal Systematics/Taxonomy/Biogeography Plant Systematics/Taxonomy/Biogeography Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Paleontology

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