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Book Chapter

Late Pennsylvanian–Early Triassic conchostracan biostratigraphy: a preliminary approach

By
Joerg W. Schneider
Joerg W. Schneider
1
Technical University Bergakademie Freiberg, Cotta-Strasse 2, D-09596 Freiberg, Germany
2
Kazan Federal University, Kremlyovskaya Street 18, 420008 Kazan, Russia
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Frank Scholze
Frank Scholze
1
Technical University Bergakademie Freiberg, Cotta-Strasse 2, D-09596 Freiberg, Germany
2
Kazan Federal University, Kremlyovskaya Street 18, 420008 Kazan, Russia
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Published:
January 01, 2018

Abstract:

Conchostracans are one of the most common fossil animal groups of continental deposits from late Palaeozoic to modern times. Their habitats have ranged from perennial lakes of the Carboniferous and Early Permian to seasonal playa lakes and temporary ponds from the late Early Permian into the Triassic, where they could form mass occurrences. This, together with relatively high speciation rates, makes them ideal guide fossils, especially in otherwise fossil-poor wet and dry red beds. Based on material and data collected since the 1980s from both surface outcrops and well cores in central Europe, a preliminary conchostracan zonation is proposed. We used a conservative approach, erecting assemblage zones comprising two or three species instead of species-range zones with only one or, sometimes, two forms. Assemblage zones are more robust and provide more reliability for each delineated time interval. Isotopically dated occurrences of conchostracan zone species, or co-occurrences of conchostracans, insect zone species and marine index fossils such as conodonts and fusulinids, allow us to correlate our assemblage zones with the marine Standard Global Chronostratigraphic Scale.

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Contents

Geological Society, London, Special Publications

The Permian Timescale

S.G. Lucas
S.G. Lucas
New Mexico Museum of Natural History, USA
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S. Z. Shen
S. Z. Shen
Nanjing Institute of Geology and Palaeontology, China
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Geological Society of London
Volume
450
ISBN electronic:
9781786203311
Publication date:
January 01, 2018

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