Late Jurassic of the Russian platform: Ammonite evolution and paleoenvironments

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Publiée : Ιαν 1, 2007
DOI : https://doi.org/10.12681/bgsg.16991
V. V. Mitta
Paleontologica! Institute of the Russian Academy of Sciences
Yu. I. Bogomolov
Interregional Social Association of Paleontologists and Mineralogists
Résumé

During the terminal age of Late Jurassic a considerable decrease in ammonoid taxonomic diversity and distinct changes of ammonite shell morphotypes are recorded in the Central Russian Basin. By the end-Volgian, ammonites are represented by only two genera belonging to a single family, which differ markedly in their shell form. The end-Jurassic decrease in ammonoid biodiversity started in the mid-Volgian and is correlated first of all with shallowing of the sea

Article Details
  • Rubrique
  • Natural Environment and Anthropogenic Activities
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Références
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