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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">litosphere</journal-id><journal-title-group><journal-title xml:lang="ru">Литосфера</journal-title><trans-title-group xml:lang="en"><trans-title>LITHOSPHERE (Russia)</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1681-9004</issn><issn pub-type="epub">2500-302X</issn><publisher><publisher-name>A.N. Zavaritsky Institute of Geology and Geochemistry</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.24930/1681-9004-2023-23-2-151-164</article-id><article-id custom-type="elpub" pub-id-type="custom">litosphere-1840</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Articles</subject></subj-group></article-categories><title-group><article-title>Кедзыдшорская свита и конодонты нижнефранских отложений на р. Изъяю (юг гряды Чернышева)</article-title><trans-title-group xml:lang="en"><trans-title>Kedzydshor Formation and conodonts of the Lower Frasnian on the Izyayu River (South of the Tchernyshev Uplift)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Соболева</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Soboleva</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>167000</p><p>ул. Первомайская, 54</p><p>Сыктывкар</p></bio><bio xml:lang="en"><p>Marina A. Soboleva</p><p>167000</p><p>54 Pervomaiskaya st.</p><p>Syktyvkar</p></bio><email xlink:type="simple">matusha.888@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Журавлев</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhuravlev</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>167000</p><p>ул. Первомайская, 54</p><p>Сыктывкар</p></bio><bio xml:lang="en"><p>Andrey V. Zhuravlev</p><p>167000</p><p>54 Pervomaiskaya st.</p><p>Syktyvkar</p></bio><email xlink:type="simple">micropalaeontology@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт геологии ФИЦ Коми НЦ УрО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Geology FRC Komi SC UB RAS</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>27</day><month>04</month><year>2023</year></pub-date><volume>23</volume><issue>2</issue><fpage>151</fpage><lpage>164</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Соболева М.А., Журавлев А.В., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Соболева М.А., Журавлев А.В.</copyright-holder><copyright-holder xml:lang="en">Soboleva M.A., Zhuravlev A.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.lithosphere.ru/jour/article/view/1840">https://www.lithosphere.ru/jour/article/view/1840</self-uri><abstract><sec><title>   Объект исследования</title><p>   Объект исследования. Конодонты и отложения раннефранского возраста южной части гряды Чернышева, отвечающие кедзыдшорской свите.</p></sec><sec><title>   Материал и методы</title><p>   Материал и методы. В основе работы лежат материалы изучения разреза кедзыдшорской свиты на р. Изъяю. Биостратиграфическое расчленение разреза построено на таксономических определениях конодонтов и корреляции со стандартными и “франскими” конодонтовыми зонами (Frasnian Zone).   Результаты. В сравнении со стратотипом кедзыдшорской свиты карбонатно-глинистые отложения на р. Изъяю представлены  фрагментами средней и верхней частей свиты в стратиграфическом объеме зоны Lower falsiovalis стандартной конодонтовой шкалы нижнего франа. Преимущественно карбонатный интервал разреза условно сопоставлен с конодонтовой зоной FZ1, а вышележащий глинистый – с FZ2. Доминирующими конодонтовыми биофациями являются полигнатидная и полигнатидно-анцироделловая.</p></sec><sec><title>   Выводы</title><p>   Выводы. Получены новые данные по распространению конодонтов в разрезе кедзыдшорской свиты на р. Изъяю. Проведено сопоставление с местными стратиграфическими подразделениями Тимано-Североуральского региона. Сделан вывод о том, что кедзыдшорская свита является одной из наиболее полных последовательностей среднепозднедевонского осадконакопления и потенциально перспективна для поиска и обоснования дискуссионного положения нижней границы франского яруса верхнего девона.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>   Research subject</title><p>   Research subject. Conodonts of the Lower Frasnian Kedzydshor Formation of the southern part of the Tchernyshev Uplift.</p></sec><sec><title>   Materials and methods</title><p>   Materials and methods. Materials obtained during a study of the section of the Kedzydshor Formation located on the Izyayu River were used. The biostratigraphic subdivision of the section was based on taxonomic definitions of conodonts and correlations with the Standard and Frasnian conodont zones.</p></sec><sec><title>   Results</title><p>   Results. In comparison with the stratotype of the Kedzydshor Formation, carbonate-argillaceous deposits cropping out on the Izyayu River are represented by fragments of the middle and upper parts of the Kedzydshor Formation in the stratigraphic range of the Lower falsiovalis Zone of the standard conodont zonation of the Lower Frasnian. The predominantly carbonate interval of the section is conventionally correlated with the FZ1 conodont zone, while the overlying terrigenous interval – with FZ2. The polygnatid and polygnatid-ancyrodellid conodont biofacies dominate in the section under study.</p></sec><sec><title>   Conclusions</title><p>   Conclusions. New data on the distribution of cono donts across the Kedzydshor Formation in the Izyayu River section were obtained. The obtained data were compared with the local stratigraphic units of the Timan-North Urals Region. The Kedzydshor Formation is one of the most complete sequences of the Middle-Upper Devonian transition, thus representing the basis for searching and substantiating the position of the debatable lower boundary of the Frasnian Stage of the Upper Devonian.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>юг гряды Чернышева</kwd><kwd>кедзыдшорская свита</kwd><kwd>разрез на р. Изъяю</kwd><kwd>нижний фран</kwd><kwd>биостратиграфия</kwd><kwd>конодонты</kwd></kwd-group><kwd-group xml:lang="en"><kwd>south of Tchernyshev Uplift</kwd><kwd>Kedzydshor Formation</kwd><kwd>Izyayu River section</kwd><kwd>Lower Frasnian</kwd><kwd>biostratigraphy</kwd><kwd>conodonts</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследования проводились в рамках государственного задания по теме № 122040600008-5</funding-statement><funding-statement xml:lang="en">The research was conducted within framework of State Assignment No. 122040600008-5</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Груздев Д. А. Позднедевонско-раннекаменноугольные изолированные карбонатные платформы на севере Урала и Пай-Хоя / Д. А. Груздев // Вестн. геонаук. – 2021. – 10 (322). – 3-15.</mixed-citation><mixed-citation xml:lang="en">Aboussalam Z. S., Becker R. 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