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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">10.24930/1681-9004-2020-20-3-328-340</article-id><article-id custom-type="elpub" pub-id-type="custom">litosphere-1295</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>Маркерные таксоны фораминифер для определения нижней границы серпуховского яруса на Урале и их корреляционный потенциал</article-title><trans-title-group xml:lang="en"><trans-title>Foraminiferal marker taxa and their correlation potential for definition of the lower Serpukhovian boundary in the Urals</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>Кулагина</surname><given-names>Е. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kulagina</surname><given-names>E. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>420008, г. Казань, ул. Кремлевская, 18</p></bio><bio xml:lang="en"><p>16/2 Karla Marksa st., ufa 450077 Russia</p><p>18 Kremlyovskaya st., Kazan 420008, Russia</p></bio><email xlink:type="simple">kulagina@ufaras.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>Башлыкова</surname><given-names>Е. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Bashlykova</surname><given-names>E. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"><p>16/2 Karla Marksa st., ufa 450077 Russia</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт геологии Уфимского научного центра РАН;&#13;
Казанский федеральный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Geology of the ufa Federal Research Centre of the Russian Academy of Sciences, &#13;
Kazan Federal university</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт геологии Уфимского научного центра РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Geology of the ufa Federal Research Centre of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>05</day><month>07</month><year>2020</year></pub-date><volume>20</volume><issue>3</issue><fpage>328</fpage><lpage>340</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кулагина Е.И., Башлыкова Е.Ю., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Кулагина Е.И., Башлыкова Е.Ю.</copyright-holder><copyright-holder xml:lang="en">Kulagina E.I., Bashlykova E.Y.</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/1295">https://www.lithosphere.ru/jour/article/view/1295</self-uri><abstract><sec><title>Предмет исследований</title><p>Предмет исследований. Выбор маркера и глобального стратотипа нижней границы серпуховского яруса в настоящее время является одной из наиболее актуальных задач международной стратиграфии. В качестве маркера уже давно предложен вид конодонта Lochriea ziegleri в эволюционной линии Lochriea nodosa – Lochriea ziegleri. Однако этот маркер еще официально не принят. Фораминиферы широко используются для расчленения каменноугольных отложений и могут служить дополнительными вспомогательными маркерами. </p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. В статье рассматривается стратиграфическое распространение маркерных видов  фораминифер Janischewskina delicatа, Neoarchaediscus postrugosus, Eolasiodiscus donbassicus, Monotaxinoides gracilis, Monotaxinoides subplanus. Эти виды применяются для определения нижней границы серпуховского яруса в разрезах Урала и Восточно-Европейской платформы. </p></sec><sec><title>Результаты исследования</title><p>Результаты исследования. Приведены данные о первоописании их голотипов. Сравнивается распространение фораминифер в разрезах верхнего визе и нижнего серпухова западного склона Урала (Кугарчи, Мурадымово, Ладейная), восточного склона Южного Урала (Верхняя Кардаиловка, Большой Кизил, Худолаз), типовых разрезах серпуховского яруса Московской синеклизы и скважин юго-востока Восточно-Европейской платформы. Сделан обзор опубликованной литературы по распространению маркерных видов в разрезах Западной Европы (Испания, Франция, северная Англия), Марокко, Казахстана, Китая, в том числе в разрезе Начин (Naqing).</p></sec><sec><title>Выводы</title><p>Выводы. В мелководных кораллово-брахиоподовых и биогермных фациях разрезов Урала могут встречаться одновременно два-три маркера, которые позволяют однозначно определить нижнюю границу серпуховского яруса. Однако в этих разрезах не встречены конодонты и аммоноидеи. Глубоководные цефалоподовые фации, содержащие конодонты, не благоприятны для фораминифер. В разрезах, в которых одновременно встречены и конодонты, и фораминиферы, появление маркерных таксонов фораминифер и конодонтов обычно не  совпадает, однако расхождение небольшое. Относительно перечисленных маркерных таксонов можно сказать, что появление этих видов не установлено в отложениях древнее серпуховского возраста. </p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Research subject</title><p>Research subject. The choice of the marker and the GSSP (Global Boundary Stratotype Section and Point) of the base of the Serpukhovian is currently one of the most urgent tasks of international stratigraphy. The first appearance datum (FAD) of the conodont Lochriea ziegleri in the lineage Lochriea nodosa – Lochriea ziegleri is proposed as a global marker for the lower boundary of the Serpukhovian Stage of the International Stratigraphic Scale. Foraminifers are widely used for the subdivision of the Carboniferous deposits and can serve as auxiliary markers. </p></sec><sec><title>Materials and methods</title><p>Materials and methods. In this paper, the stratigraphic distribution of the foraminiferal marker species Janischewskina delicatа, Neoarchaediscus postrugosus, Eolasiodiscus donbassicus, Monotaxinoides gracilis, Monotaxinoides subplanus is discussed. These species are used to define the lower boundary of the Serpukhovian in the Urals and in the East European Platform. </p></sec><sec><title>Results</title><p>Results. Data on the first descriptions of their holotypes are summarized. The distributions of these species in the sections of the western slope of the Urals (Kugarchi, Muradymovo, Ladeinaya), the eastern slope of the South Urals (“Verkhnyaya” Kardailovka, Bolshoi Kizil, Khudolaz), the Serpukhovian type sections of the Moscow Syneclise and the boreholes of the southeast of the East European Platform are compared. The published ranges of the marker species in the sections of Western Europe (Spain, France, and northern England), Morocco, Kazakhstan, and China, including the Naqing section are reviewed. </p></sec><sec><title>Conclusion</title><p>Conclusion. In the shallow-water coral-brachiopod and bioherm facies of the Ural sections, two or three markers can be found simultaneously. In these sections, it is possible to unambiguously determine the lower boundary of the Serpukhovian. However, here, conodonts and ammonoids were not found. Deep-water cephalopod facies containing conodonts are not favorable for foraminifers. In sections where both conodonts and foraminifera are simultaneously encountered, the appearance of foraminiferal marker taxa and conodonts rarely coincide; however, the divergence is small. Regarding the marker taxa under study, their appearance has not been established in sediments older than those dated as the Serpukhovian. </p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>визейский ярус</kwd><kwd>серпуховский ярус</kwd><kwd>фораминиферы</kwd><kwd>маркеры</kwd><kwd>Урал</kwd><kwd>Восточно-Европейская платформа</kwd><kwd>глобальная корреляция</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Visean</kwd><kwd>Serpukhovian</kwd><kwd>foraminifers</kwd><kwd>marker species</kwd><kwd>urals</kwd><kwd>East European Platform</kwd><kwd>Global correlation</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках научно-исследовательских работ государственного задания ИГ УФИЦ РАН (№ 0246-2019-0118) и частично за счет субсидии, выделенной в рамках государственной поддержки Казанского (Приволжского) федерального университета в целях повышения его конкурентоспособности среди ведущих мировых научно-образовательных центров. Авторы благодарны С.В. 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