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Non-marine Permian biostratigraphy and biochronology: an introduction

By
Spencer G. Lucas
Spencer G. Lucas
1
New Mexico Museum of Natural History and Science
1801 Mountain Road N.W., Albuquerque, New Mexico 87104-13 YJ, USA
spencer.lucas@state.nm.us
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;
Joerg W. Schneider
Joerg W. Schneider
2
TU Bergakademie Freiberg
B.v. Cotta-Strasse 2, D-09596 Freiberg, Germany
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;
Giussepe Cassinis
Giussepe Cassinis
3
Pavia University, Earth Science Department
via Ferrata 1, 27100 Pavia, Italy
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Published:
January 01, 2006

Abstract

The Permian time scale based on marine rocks and fossils is well defined and of global utility, but non-marine Permian biostratigraphy and chronology is in an early phase of development. Non-marine Permian strata are best known from western Europe and the western United States, but significant records are also known from Russia, South Africa, China and Brazil. Global time terms based on non-marine Permian strata, such as Rotliegend, Zechstein, Autunian, Saxonian and Thuringian, are either inadequately defined or poorly characterized and should only be used as lithostratigraphic terms. Macro- and microfloras have long been important in non-marine Permian correlations, but are subject to limitations based on palaeoprovinciality and facies/climatic controls. Charophytes, conchostracans, ostracodes and freshwater bivalves have a potential use in non-marine Permian biostratigraphy but are limited by their over-split taxonomy and lack of well-established stratigraphic distributions of low-level taxa. Tetrapod footprints provide poor biostratigraphic resolution during the Permian, but tetrapod body fossils and insects provide more detailed biostratigraphic zonations, especially in the Lower Permian. Numerous radioisotopic ages are available from non-marine Permian sections and need to be more precisely correlated to the global time scale. The Middle Permian Illawarra reversal and subsequent magnetic polarity shifts are also of value to correlation. There needs to be a concerted effort to develop non-marine Permian biostratigraphy, to correlate it to radio-isotopic and magnetostratigraphic data, and to cross-correlate it to the marine time scale.

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Geological Society, London, Special Publications

Non-Marine Permian Biostratigraphy and Biochronology

Spencer G. Lucas
Spencer G. Lucas
New Mexico Museum of Natural History, USA
Search for other works by this author on:
;
Giuseppe Cassinis
Giuseppe Cassinis
Universitfi di Pavia, Italy
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;
Joerg W. Schneider
Joerg W. Schneider
TU Bergakademie Freiberg, Germany
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Geological Society of London
Volume
265
ISBN electronic:
9781862395138
Publication date:
January 01, 2006

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