First findings of Otoceras (Ceratitida) in the Kobyuma zone of the Southern Verkhoyansk region, Northeastern Russia
The samples of the genus Otoceras, which is an important biostratigraphic marker of the Permian-Triassic boundary deposits of the Boreal realm, were found in the Kobyuma structural and facies zone of the Southern Verkhoyansk region. The features of the geographic and vertical distribution of Otocera...
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| Format: | Article |
| Language: | English |
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Kazan Federal University
2019-12-01
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| Series: | Učënye Zapiski Kazanskogo Universiteta. Seriâ Estestvennye Nauki |
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| Online Access: | https://kpfu.ru/uz-eng-ns-2019-4-4.html |
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| author | R.V. Kutygin I.V. Budnikov A.S. Biakov V.I. Davydov A.N. Kilyasov V.V. Silantiev |
| author_facet | R.V. Kutygin I.V. Budnikov A.S. Biakov V.I. Davydov A.N. Kilyasov V.V. Silantiev |
| author_sort | R.V. Kutygin |
| collection | DOAJ |
| description | The samples of the genus Otoceras, which is an important biostratigraphic marker of the Permian-Triassic boundary deposits of the Boreal realm, were found in the Kobyuma structural and facies zone of the Southern Verkhoyansk region. The features of the geographic and vertical distribution of Otoceras in the northern part of the Southern Verkhoyansk region were considered. The age of Otoceras beds was discussed. In the Verkhoyansk region, the Otoceras beds are divided into Concavum and Boreale zones. In the Tiryakh-Kobyume section of the Kobyuma zone, two close levels with ceratites of the genus Otoceras were revealed. From the first (lower) level, Otoceras aff. gracile Tozer and O. sp. were identified, presumably related to the Concavum zone of the highest part of the Changhsingian stage (Permian, Lopingian Series). At the second (upper) level, a large specimen of the species Otoceras boreale Spath was discovered, which makes it possible to attribute the host deposits to the Boreale zone of the Induan stage base (Lower Triassic). A section interval containing ceratites of the genus Tompophiceras of the Pascoei and Morpheos zones was revealed above the Otoceras beds. Since no own Triassic local stratigraphic scheme has been established in the Kobyuma zone, it is expedient to use the Nekuchan Formation (Induan deposits) of the Allakh-Yun’ zone of the Southern Verkhoyansk region. |
| first_indexed | 2024-03-13T08:16:49Z |
| format | Article |
| id | doaj.art-a07bb285ac014ca7bbc14a90ad2697c7 |
| institution | Directory Open Access Journal |
| issn | 2542-064X 2500-218X |
| language | English |
| last_indexed | 2024-03-13T08:16:49Z |
| publishDate | 2019-12-01 |
| publisher | Kazan Federal University |
| record_format | Article |
| series | Učënye Zapiski Kazanskogo Universiteta. Seriâ Estestvennye Nauki |
| spelling | doaj.art-a07bb285ac014ca7bbc14a90ad2697c72023-05-31T15:47:34ZengKazan Federal UniversityUčënye Zapiski Kazanskogo Universiteta. Seriâ Estestvennye Nauki2542-064X2500-218X2019-12-01161455057010.26907/2542-064X.2019.4.550-570First findings of Otoceras (Ceratitida) in the Kobyuma zone of the Southern Verkhoyansk region, Northeastern RussiaR.V. Kutygin0I.V. Budnikov1A.S. Biakov2V.I. Davydov3A.N. Kilyasov4V.V. Silantiev5Diamond and Precious Metal Geology Institute, Siberian Branch, Russian Academy of Sciences, Yakutsk, 677000 RussiaSiberian Research Institute of Geology, Geophysics and Mineral Resources, Novosibirsk, 630091 RussiaN.A. Shilo North-East Interdisciplinary Scientific Research Institute, Far East Branch, Russian Academy of Sciences, Magadan, 685000 RussiaBoise State University, Boise, 1910 USADiamond and Precious Metal Geology Institute, Siberian Branch, Russian Academy of Sciences, Yakutsk, 677000 RussiaKazan Federal University, Kazan, 420008 RussiaThe samples of the genus Otoceras, which is an important biostratigraphic marker of the Permian-Triassic boundary deposits of the Boreal realm, were found in the Kobyuma structural and facies zone of the Southern Verkhoyansk region. The features of the geographic and vertical distribution of Otoceras in the northern part of the Southern Verkhoyansk region were considered. The age of Otoceras beds was discussed. In the Verkhoyansk region, the Otoceras beds are divided into Concavum and Boreale zones. In the Tiryakh-Kobyume section of the Kobyuma zone, two close levels with ceratites of the genus Otoceras were revealed. From the first (lower) level, Otoceras aff. gracile Tozer and O. sp. were identified, presumably related to the Concavum zone of the highest part of the Changhsingian stage (Permian, Lopingian Series). At the second (upper) level, a large specimen of the species Otoceras boreale Spath was discovered, which makes it possible to attribute the host deposits to the Boreale zone of the Induan stage base (Lower Triassic). A section interval containing ceratites of the genus Tompophiceras of the Pascoei and Morpheos zones was revealed above the Otoceras beds. Since no own Triassic local stratigraphic scheme has been established in the Kobyuma zone, it is expedient to use the Nekuchan Formation (Induan deposits) of the Allakh-Yun’ zone of the Southern Verkhoyansk region.https://kpfu.ru/uz-eng-ns-2019-4-4.htmlpermian-triassic boundaryinduan stagenekuchan formationprivol’nyi formationammonoidsotoceras borealetiryakh-kobyume sectionverkhoyansk region |
| spellingShingle | R.V. Kutygin I.V. Budnikov A.S. Biakov V.I. Davydov A.N. Kilyasov V.V. Silantiev First findings of Otoceras (Ceratitida) in the Kobyuma zone of the Southern Verkhoyansk region, Northeastern Russia Učënye Zapiski Kazanskogo Universiteta. Seriâ Estestvennye Nauki permian-triassic boundary induan stage nekuchan formation privol’nyi formation ammonoids otoceras boreale tiryakh-kobyume section verkhoyansk region |
| title | First findings of Otoceras (Ceratitida) in the Kobyuma zone of the Southern Verkhoyansk region, Northeastern Russia |
| title_full | First findings of Otoceras (Ceratitida) in the Kobyuma zone of the Southern Verkhoyansk region, Northeastern Russia |
| title_fullStr | First findings of Otoceras (Ceratitida) in the Kobyuma zone of the Southern Verkhoyansk region, Northeastern Russia |
| title_full_unstemmed | First findings of Otoceras (Ceratitida) in the Kobyuma zone of the Southern Verkhoyansk region, Northeastern Russia |
| title_short | First findings of Otoceras (Ceratitida) in the Kobyuma zone of the Southern Verkhoyansk region, Northeastern Russia |
| title_sort | first findings of otoceras ceratitida in the kobyuma zone of the southern verkhoyansk region northeastern russia |
| topic | permian-triassic boundary induan stage nekuchan formation privol’nyi formation ammonoids otoceras boreale tiryakh-kobyume section verkhoyansk region |
| url | https://kpfu.ru/uz-eng-ns-2019-4-4.html |
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