Abstract The results of micropaleontological analysis of the boundary interval of the lower–middle Callovian in the TETs-5 section (Saratov) are presented. The taxonomic composition and distribution of foraminifera and ostracods in the section are studied. The ranges of the biostratigraphic units inferred from microfauna and their correlation with the ammonite scale are refined. Two foraminiferal zones

Abstract The biostratigraphic data on the ammonoid, brachiopod, conodont, and ostracod assemblages of the Mamontovo and Zarechnoe horizons of the Salair were revised and analyzed. The stratigraphic succession of the Middle Devonian deposits of the Salair is clarified, and the new Zarechnoe Horizon, including the Akarachkino, Safonovo, and Kerlegesh beds, is proposed. The upper Eifelian ammonoid assemblage

Abstract The results of microfaunistic (benthic foraminifers) and magnetostratigraphic (paleomagnetic and petromagnetic) studies obtained in the lower part of the Upper Cretaceous deposits of the Kommunar section are presented. On the basis of the study of benthic foraminifers, the section consists of middle and upper Turonian, Coniacian, lower and upper Santonian, and basal horizon of the lower Campanian

Abstract Traces of extremely powerful explosive volcanic eruptions are documented in the southern Moscow Syneclise; the eruptions occurred in the Moscovian Age about 309 million years ago in Variscan orogenic regions adjacent to the East European Platform. Interbeds of altered volcanic ash, 5–15 cm thick, can be traced over the distance of tens of kilometers in the sediments referring to the Podolskian

Abstract— The results of study of marine and terrestrial palynomorphs in the Lower Kimmeridgian and Middle-Upper Volgian in the Eganovo section (Moscow region) are presented. The section is well characterized by ammonites providing a biostratigraphic control of the palynostratons. Beds with spores and pollen are identified for the Volgian interval and beds with dinocysts are distinguished for the entire

Abstract The carbonaceous macrofossils which belong to multicellular algae and which were previously known from the younger (>570 Ma) Miaohe biota are found for the first time in the Lower Vendian (Middle Ediacaran, ~580 Ma) rocks of the Ura Formation of the Patom Basin in Siberia. The Ura macrofossils include phytoleims of unbranched ribbon-like thalli preserved on the surfaces of silty mudstones

Abstract Early Cretaceous gastropods occur on the eastern margin of Lut Block in Eastern Iran. The gastropod assemblage reported herein is from the Nimbolook section located in the west of Qayen. The section mostly includes marls and limestones. It was dated as Aptian owing to the findings of foraminifers, nannofossils and ammonites. The exposure provides a relatively well-preserved gastropod fauna

Abstract New data have been obtained on composition and age of the Archean supracrustal complexes of the Yalonvara–Pertinjarvi, Korpijarvi, and Pastajarvi structures in the marginal part of the Karelian Craton of the Fennoscandian Shield in the conjunction area with the Svecofennian Orogen. The structures were typically attributed to the single Yalonvara–Ilomantsi greenstone belt. On the basis of geochronological

Abstract Changes in (La/Yb)N, Eu/Eu*, tNd(DM), and εNd(t) values in Upper Precambrian clay rocks on the western slope of the Southern Urals are considered. The (La/Yb)N, Eu/Eu*, and εNd(t) average values in Riphean and Vendian clay rocks are 5.7–15.1, 0.58–0.74, and –14.6 to –5.1, respectively. This reflects the change in the composition of the source areas and fits well into the general outline of

Abstract The Jurassic rocks of the area of Kanev glacial dislocations (Central Ukraine) with the Bathonian coastal marine (lagoon) and the Lower Callovian normal marine sediments have been studied, the upper part of which was unknown to the predecessors. The zonal and infrazonal scale of the Lower Callovian of Kanev dislocations are elaborated by ammonites and include four zones, five subzones, and

An Erratum to this paper has been published: https://doi.org/10.1134/S0869593821330017

An Erratum to this paper has been published: https://doi.org/10.1134/S0869593821330029

Abstract On the basis of the results of studying the faunal collections of bivalves and foraminifera collected in the period of 1976–2014 in the Cape Tsvetkov region in Eastern Taimyr, the knowledge of the Pliensbachian–Aalenian part of the section of the Tsvetkov geological region is expanded. The bedding in the section is described, and a comprehensive paleontological characteristic is given. For

Abstract The article discusses the main disagreements between two published models (the authors’ model and the previously published model by V.V. Mitta et al.) of the structure and stratigraphic subdivision of the Bajocian–Bathonian reference section in the north of European Russia (near the Dreshchanka River mouth, Izhma River basin). Calculation of dip and strike makes it possible to verify mutually

Abstract On the basis of the study of shell morphogenesis, the classification of the Toarcian–Aalenian representatives of the genus Arctotis Bodylevsky, 1960 was refined. A sequence of species was established in the reference sections of Anabar Bay and Cape Tsvetkov (Eastern Taimyr), traced in a series of Toarcian and Aalenian sections in Eastern Siberia, and correlated with the Boreal ammonite scale

Abstract— This paper presents results of the micropaleontological study of permafrost sediments exposed by CHUK 1/17 borehole at Cape Maly Chukochy, on the coast of the East Siberian Sea (Kolyma Lowland). Micropaleontological analysis, together with the lithological structure and the main physicochemical characteristics, enabled reconstructing sedimentation conditions during transition from nearshore

Abstract The oil and gas potential of the southeast of Western Siberia dictates increased attention to plant phytoleimmas from the Naunak and Tyumen formations. The morphological features of fossil plants are often insufficient for distinguishing horizons or formations within sedimentary strata. Infrared (IR) spectroscopy allows revealing new diagnostic features in the structures of phytofossils. It

Abstract— The U–Th–Pb (LA-ICP-MS) dating of detrital zircons from the Upper Precambrian metaterrigenous rocks of the Chetlas Group in the Middle Timan Range (Svetlinskaya, Novobobrovsk, and Vizingskaya formations) enabled the reconstruction of the provenance of detrital material and establishing the maximum depositional age (MDA) of these sediments (middle–terminal Middle Riphean). It was found that

Abstract The morphology of acritarch species Elektoriskos? williereae (G. & M. Deflandre, 1965) Vanguestaine, 1979, previously considered as a Silurian index of the Llandovery, has been clarified, the diagnosis emended, and the stratigraphic distribution expanded. According to new data, the first appearance of E.? williereae was confined to the upper part of the Baksan Horizon near the boundary of

Abstract— The complete sections of the Lower and Upper Vendian of the East European Platform were opened in the boreholes of Belarus. This allows us to consider this region as a stratotype area. In order to update the paleontological characteristics of the Vendian, organic-walled microfossils from the Bogushevsk-1, Bogushevsk-2 (Liozno), and Lepel-1 reference boreholes drilled in the north of the Orsha

Abstract The controversial problems of stratigraphy, geomorphology, and chronology of the Early Paleolithic Karama site in the Altai Mountains are considered. This work is a response to the article by Ya.V. Kuzmin and A.Yu. Kazansky “Comments on the ‘Debatable Aspects of Initial Human Colonization of Siberia and Age of the Karama Site in the Altai Mountains’” by V.S. Zykin, V.S. Zykina, and L.G. Smolyaninova

Abstract Chineiveem taphoflora from the Krivorechenskaya Formation of the Anadyr River left bank (Northeast Asia) is characterized by a relatively low diversity of plants represented by ginkgoaleans, conifers, and angiosperms. Judging by their systematic composition, this taphoflora is younger than the Grebenka flora from the Krivorechenskaya Formation of the Anadyr River basin. Its closest analog

Abstract— Data on fossils and stratigraphy of the Bajocian and Bathonian boundary deposits in the north of European Russia recently published by Ippolitov, Zakharov, Kiselev, et al. are discussed. Their previously proposed correlation of the Middle Jurassic reference sections of the Pechora North region on the Dreshchanka River (a tributary of the Izhma River), as a result of which the visible thickness

Abstract The results of stratigraphic studies carried out in the process of international deep-sea drilling in the last fifty years are presented. They make a great contribution to development and improvement of the methods for detailed stratigraphic studies and dating of marine sedimentary sequences as well as reconstructions of past oceanological and climatic events. The results obtained are of great

Abstract The paper continues a complex study of the Santonian–Campanian boundary of the Aksu-Dere and Kudrino-2 sections (Bakhchisarai region, Southwestern Crimea), the sedimentological and biostratigraphic data on which are provided in paper 1. This work presents the paleomagnetic, rock magnetic, and geochemical data on C and O stable isotopes. The 87Sr/86Sr values of limestones increase upward the

Abstract— Numerous fusulinids were found in the middle part of the Jamal Formation (Ney Eshkiny section) in the Tabas region of Central Iran. The assemblage includes 12 species of 12 genera (Zarodella, ?Grovesella, Pseudoendothyra, Nankinella, Schubertella, Dunbarula, Yangchienia, Chusenella, Verbeekina, Pseudodoliolina, Neoschwagerina, and Sumatrina. This association characteristic of the upper part

Abstract As a result of complex interdisciplinary studies, the existence of much more complex glacial-interglacial climatic rhythms than previously thought was revealed in the Neopleistocene history of the Oka–Don Loess Province. We have established nine warm epochs (seven interglacials, two interstadials, including the Holocene) and eight interglacial epochs or cooling periods over the last 0.7–0

Abstract The leaves of the genus Pseudotorellia from the Upper Jurassic–Lower Cretaceous of the Bureya Basin (Russian Far East) have been revised. The similarity of Pseudotorellia angustifolia Doludenko and P. longifolia Doludenko in the morphology and epidermal characters suggests that P. longifolia is a synonym of P. angustifolia. Leaves of this genus from the Bureya Basin previously assigned to

Abstract The Sangilen and Khan-Khuhei blocks in the southwestern part of the Tuva-Mongolian terrane (TMT) combine into a composite structure, formed in the course of the Early Paleozoic (ca. 505–495 Ma) regional low- to moderate-pressure metamorphism. Manifestations of an earlier higher pressure metamorphism are known in both blocks. The upper age limit for the Sangilen block is defined by granites

Abstract Ammonites from two separate limestone blocks in the Bodrak River basin (Southwest Crimea) are described. The assemblage from the first boulder (on Tatyana’s Hill) is represented by the Echioceratidae ammonites (genera Orthechioceras and Echioceras). The ammonite complex from the second boulder (in the Ammonite Ravine) is represented by one species of Calliphylloceras (family Phylloceratidae)

Abstract— New complex data have been obtained for two sections of the Santonian–Campanian boundary of Southwestern Crimea. Article 1 presents detailed geological descriptions of sections, lithological, mineralogical, and paleoichnological materials, and the results of determining macro- (crinoids, ammonoids, belemnites) and micropaleontological (dinocysts, nannoplankton, benthic and planktonic foraminifers)

Abstract The Devonian strata of the Tagil Megazone were studied on the eastern slope of the Northern Urals. It was established that Devonian sedimentary-volcanogenic formations were formed within three paleoenvironments: the shelf zone of the extinct Silurian island arc, the intra-arc trough, and the active island arc. The volcanics are similar in composition to the modern island-arc rocks. This zoning

Abstract The Middle Eocene–Oligocene marine sediments and their underlying and overlapping sequences, which are confined to four Cenozoic troughs and two depressions located in the marginal parts of the Mesozoides of the Koryak Upland in the Northeast Asia, are considered. These rocks formed during significant marine transgression, which also spanned adjacent regions of Kamchatka, Sakhalin, and Japan

Abstract This study focuses on late Paleocene–middle Eocene planktonic and small benthic foraminiferal assemblages from the Khangiran Formation in the Kopet-Dagh Basin (NE Iran). The patterns of regional distribution of foraminiferal fauna were observed in this study, although many of the global foraminiferal index species are absent in the studied southernmost Peri-Tethys neritic section. Accordingly

Abstract The paper presents the results on stratigraphy and chronology of the Late Pleistocene obtained on the basis of both OSL and 14C dating of paleosols and sediments in the Aleksandrov quarry, located in the Central Russian Upland. As this section was confined to the paleo-ravine, its layers reflected multiple alternations of the stages of soil formation, cryogenesis, and sedimentation in the

Abstract Eocene silicofossils (diatoms and silicoflagellates), dinoflagellate cysts, and continental palynomorphs of two boreholes in the Cis-Donetsk and Pavlovsk–Kantemirovka structural-facies zones of the Donets Syncline were studied. The Veshenskaya Formation, characterized by the dinocyst assemblage of the Stenodinium meckelfeldense Zone, is assigned to the early Ypresian. The Tishki and Kasyanоvka

Abstract New data on the age of the tectonostratigraphic sections in the area of the Utesiki River (northwestern part of Koryak Highland) are presented. A new Kimmeridgian–Berriasian association of radiolarians belonging to the South Boreal Province has been identified. Species characteristic of the Kimmeridgian–Berriasian of North and South America, Japan, the Antarctic Peninsula, and a number of

Abstract In the Ritchie’s Archipelago of the Andaman group of islands (Northern Indian Ocean), Havelock Island is the largest one. The present study on diatoms has been carried out on three outcrops of Havelock Island situated in Kalapathar, South Point and Laccam Point localities. Samples collected from the three Neogene outcrops yielded poor to moderately preserved diatom valves. Two lithological

Abstract— The first Sr isotope data and the new C isotope signatures have been obtained for the metacarbonate rocks of the Sortavala Group in the Fennoscandian Shield. The metacarbonate rocks of the lower carbonate horizon of this group represent the sediments of shallow partly isolated paleobasins, whereas the carbonate deposits of the upper horizon represent the sediments of the distal part of an

Abstract The first sediment N-isotope data on the Permian–Triassic boundary transition of the Verkhoyansk region are obtained. Together with the other published materials on other regions of eastern Russia allow us to distinguish a number of N-isotope intervals of various ranks in the Permian–Triassic of eastern Russia. In addition to the well-known method of reconstructing the redox conditions of

Abstract The results of geochronological studies (LA-ICP-MS) of detrital zircons of the Tatsaingol block in the southeastern part of the Neoproterozoic Southern Khangay metamorphic belt are presented. Two sequences, metaclastic rocks and hornblende schists (metavolcanics), are distinguished in the Tatsaingol complex of this block. The metaclastic rocks are found to contain manifestations of the processes

Abstract— The results of a paleontological and stratigraphic study of an assemblage of Paleozoic primitive calcareous foraminifers from the central part of the Mendeleev Rise (Eastern Arctic) are presented. The obtained data allow us to refine and correct the age of strata containing these fossils. It is shown that the Parathurammina (s.l.) foraminifera are the most stratigraphically informative in