title: Biostratigraphy of Upper Jurassic of the Valy clay pit (Samarskaya Luka) by ammonites, ostracods and dinocysts
metadata.name: dc.contributor.author
metadata.value: Rogov, Mikhail A.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Savelieva, Julia N.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Shurekova, Olga V.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2021-11-08T20:20:50Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2021-11-08T20:20:50Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2021-09
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Rogov, M. A., Savelieva, Ju. N., Shurekova, O. V. (2021). Biostratigraphy of Upper Jurassic of the Valy clay pit (Samarskaya Luka) by ammonites, ostracods and dinocysts. Vestnik of Saint Petersburg University. Earth Sciences, 66 (3), 510–532.
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: https://doi.org/10.21638/spbu07.2021.305
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/33510
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: The article presents results of a comprehensive biostratigraphic study of Upper Jurassic deposits
  of the clay pit near the village of Valy (Syzran district, Samara region). For the first
  time, a bed-by-bed description was made as well as a subdivision of the section into zones,
  subzones and biohorizons based on ammonites was established. Bauhini and Kitchini zones
  (Bayi subzone) are established in the Lower Kimeridgian, while the Upper Kimmeridgian
  is represented only by the Autissiodorensis zone. In the Lower Volgian, the Sokolovi
  and Pseudoscythica zones were recognized, while the Middle Volgian is represented by the Panderi zone. The age of the regionally developed unconformity at the base of the Trazovo
  Formation has been clarified. As in the sections located to the south of the studied section,
  this unconformity is located at the base of the Autissiodorensis zone, overlying different horizons
  of the Oxfordian and lower Kimmeridgian. For the first time for the Kimmeridgian of
  Central Russia in the marlstone band of the Kitchini zone (bayi biohorizon), solitary corals
  conditionally attributed to the genus Trochocyathus were found. Along with corals, other
  warm-water taxa (belemnites Hibolithes, rare ammonites Taramelliceras) were found in the
  same bed, suggesting deposition of this bed during the short-time warming event. 6 biostratigraphic
  units (zone and beds with fauna) were recognized by ostracods, along with
  2 dinocyst-based units (assemblage and zone) which are compared with the stratigraphic
  subdivisions for these groups, previously proposed for the Kimeridgian and Volgian stages
  of the Russian Platform. The paleo-ecological analysis makes it possible to assume that
  sediments have accumulated in the warm shallow eutrophic basin with depths up to 50 m,
  with a gradual increase of eutrophy over time. At some levels, short-term episodes of severe
  shallowing or freshening are recorded by ostracods.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: ru
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: St Petersburg State University
metadata.lang: en_GB
metadata.name: dc.relation.ispartofseries
metadata.value: Vestnik of St Petersburg University. Earth Sciences;Volume 66; Issue 3
metadata.lang: -
metadata.name: dc.subject
metadata.value: biostratigraphy
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: ammonites
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: ostracods
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: dinocysts
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Oxfordian
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Kimmeridgian
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Volgian
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: Samara region
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Biostratigraphy of Upper Jurassic of the Valy clay pit (Samarskaya Luka) by ammonites, ostracods and dinocysts
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 510-532.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/33510/1/510-532.pdf
resources.format: Adobe PDF
resources.size: 3,69 MB