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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">Stratigraphy and Geological Correlation</journal-id><journal-title-group><journal-title xml:lang="en">Stratigraphy and Geological Correlation</journal-title><trans-title-group xml:lang="ru"><trans-title>Стратиграфия. Геологическая корреляция</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0869-592X</issn><issn publication-format="electronic">3034-6037</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">658032</article-id><article-id pub-id-type="doi">10.31857/S0869592X23010039</article-id><article-id pub-id-type="edn">JNZVGU</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Early Jurassic Flood Basalt Volcanism on the Franz Josef Land Archipelago: Geological and Palynostratigraphical Data</article-title><trans-title-group xml:lang="ru"><trans-title>Раннеюрский платобазальтовый вулканизм архипелага Земля Франца-Иосифа: геологические и палиностратиграфические данные</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Karyakin</surname><given-names>Yu. V.</given-names></name><name xml:lang="ru"><surname>Карякин</surname><given-names>Ю. В.</given-names></name></name-alternatives><email>dinoflag@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Aleksandrova</surname><given-names>G. N.</given-names></name><name xml:lang="ru"><surname>Александрова</surname><given-names>Г. Н.</given-names></name></name-alternatives><email>dinoflag@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name><surname>Никишин</surname><given-names>А.М.</given-names></name><email>dinoflag@mail.ru</email></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Geological Institute, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Геологический институт РАН</institution></aff></aff-alternatives><content-language>ru</content-language><pub-date date-type="pub" publication-format="electronic" iso-8601-date="2023-01-01"><day>01</day><month>01</month><year>2023</year></pub-date><pub-date date-type="collection"><year>2023</year></pub-date><volume>31</volume><issue>1</issue><fpage>27</fpage><lpage>51</lpage><history><date date-type="received" iso-8601-date="2025-02-20"><day>20</day><month>02</month><year>2025</year></date></history><pub-history><event event-type="received"><event-desc>Received:<date date-type="received" iso-8601-date="2025-02-20"><day>20</day><month>02</month><year>2025</year></date></event-desc></event><event event-type="pub"><event-desc>Published:<pub-date date-type="pub" publication-format="electronic" iso-8601-date="2023-01-01"><day>01</day><month>01</month><year>2023</year></pub-date></event-desc></event></pub-history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Ю.В. Карякин, Г.Н. Александрова</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Ю.В. Карякин, Г.Н. Александрова</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Ю.В. Карякин, Г.Н. Александрова</copyright-holder><copyright-holder xml:lang="ru">Ю.В. Карякин, Г.Н. Александрова</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/0869-592X/article/view/658032">https://journals.eco-vector.com/0869-592X/article/view/658032</self-uri><abstract xml:lang="en"><p id="idm45181323596672">Biostratigraphic evidence of the presence of Early Jurassic flood basalts on the Franz Josef Land archipelago is presented. The flood basalts form layered section with two units, which is not discovered for Early Cretaceous basalts. The lower unit is composed by large-columnar basalts (colonnade), and the upper unit by small-columnar (entablature) chaotic-fan basalts. On the Hooker Island, the basalt flow is exposed on the Sedov Plateau, on the Lunacharsky Rock Cape and, possibly, on Al’banov Cape. On the southern slope of the Sedov Plateau, the basalt flow overlaps sands and sandstones, which contain palynoassemblage of the lower Toarcian. In the Lunacharsky Rock Cape outcrop, the underlying basalt sands are of the Pliensbachian to Early Toarcian chronostratigraphic interval. Apart from the Hooker Island, we observed basalts with the “colonnade/entablature” on three other islands: Scott Keltie, May and Leigh-Smith. The most complete section was found in the western part of the Leigh-Smith Island, where basalts are underlain and overlapped by sand units. The underlying sands in contact with basalts have a quenching zone. There is no quenching zone at the contact with the overlapping sands. A palynocomplex from the lower sand unit is early Toarcian in age. The palynocomplex found in the upper sand unit indicates its accumulation in the interval from the lower part of the late Toarcian to the early Aalenian. A palynological study of the underlying and overlying deposits of the basalt flow has shown that the flow is underlain by continental and coastal-marine sediments of the Pliensbachian to the upper part of the early Toarcian age interval. Basalt flow is overlain by the earliest late Toarcian–early Aalenian marine sediments. According to the modern chronostratigraphic scale, the age of the basalt flow can be estimated as approximately 180 million years, which is quite consistent with the earlier obtained <sup>40</sup>Ar/<sup>39</sup>Ar data of 189.1 ± 11.4 million years. These data indicate that the basalt flow was formed during a narrow stratigraphic interval of the uppermost lower–earliest upper Toarcian.</p></abstract><trans-abstract xml:lang="ru"><p id="idm45181323593568">Приведено биостратиграфическое обоснование наличия на территории архипелага Земля Франца-Иосифа покрова платобазальтов раннеюрского возраста. Лавы покрова формируют двухъярусный тип разреза, не встречающийся в покровах раннемелового возраста. Нижний ярус разрезов этого типа сложен крупностолбчатыми колонновидными базальтами (колоннада), а верхний – мелкостолбчатыми хаотично-веерными базальтами (антаблемент). На о. Гукера покров обнажается на плато Седова, на мысе Скала Луначарского и, возможно, на мысе Альбанова. На южном склоне плато Седова базальтовый покров залегает на песках и песчаниках, содержащих палинокомплекс раннего тоара. В обнажении мыса Скала Луначарского подстилающие базальты пески датируются плинсбахом–ранним тоаром. Помимо о. Гукера базальты с текстурой “колоннада/антаблемент” установлены нами еще на трех островах: Скотт-Келти, Мей и Ли-Смита. Самый полный разрез обнаружен на западе о. Ли-Смита, где базальты подстилаются и перекрываются толщами песков. В подстилающих песках на контакте с базальтами проявлена отчетливая зона закалки, в то время как на контакте с перекрывающими песками она отсутствует. В подстилающей базальты толще песков определен палинокомплекс, датируемый ранним тоаром, а палинокомплекс, обнаруженный в перекрывающей их толще песков, свидетельствует о накоплении их в интервале от начала позднего тоара по ранний аален включительно. Палинологическое изучение подстилающих и перекрывающих базальтовый покров осадочных отложений показало, что покров подстилается континентальными и прибрежно-морскими отложениями плинсбаха–верхов нижнего тоара и перекрывается морскими отложениями низов верхнего тоара–нижнего аалена. В соответствии с последней версией Международной хроностратиграфической шкалы возраст покрова может быть оценен примерно в 180 млн лет, что вполне согласуется с данными <sup>40</sup>Ar/<sup>39</sup>Ar возраста 189.1 ± 11.4 млн лет, полученными ранее. Эти данные указывают на формирование покрова в узком стратиграфическом интервале – на границе раннего и позднего тоара.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Russian Arctic</kwd><kwd>Jurassic</kwd><kwd>Toarcian</kwd><kwd>basalt volcanism</kwd><kwd>colonnade</kwd><kwd>entablature</kwd><kwd>palynocomplex</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>Российская Арктика</kwd><kwd>юра</kwd><kwd>тоар</kwd><kwd>базальтовый вулканизм</kwd><kwd>колоннада</kwd><kwd>антаблемент</kwd><kwd>палинокомплекс</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Бергер М.Г. Терригенная минералогия. 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