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Now showing items 41-60 of 151
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(2002)Three horizons of phthanites and black carbonaceous mudstones are distinguished in the key section of Triassic and Jurassic cherty deposits of the Gorbusha Sequence near the Settlement of Dal'negorsk (Sikhote Alin). The ...
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(2001)Horst-accretionary systems (HAS) extended to the northeast and alternating with rift-grabens (RG) were established within the bounds of the southeastern margin of Asia. The synchronous formation of these positive and ...
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(2003)A detailed record of sea surface temperatures in the Northern Hemisphere based on migration of marine invertebrate fauna (ammonites) and isotopic thermometry (δ18O values of shark tooth enamel) indicates a severe cooling ...
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(1991)A Bathonian volcanogenic unit in northern Karabakh was examined. It was established that it belongs to a tholeiitic series of the ferruginous moderately highly titaniferous type. Two complexes were identified: an early ...
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(1988)We analyzed asphaltenes of crude oils and bitumens in dispersed organic matter from various regions of the West Siberian block and the Siberian craton. The West Siberian crude oil samples were collected from Jurassic and ...
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(2001)Isotopic dating showed that rhyolites of the Kushmurun graben are divisible into two groups different in age. One group is close to the Induan-Olenekian boundary in its chronostratigraphic position and has K-Ar and Rb-Sr ...
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(1987)The Dauletabad-Donmez gas field is in the southern part of the Amu Dar'ya oil and gas province. The identification of the origin and sources of H2S in gases of the Dauletabad-Donmez field is very important, particularly ...
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(2004)This contribution presents the first detailed oxygen and carbon isotope record from the latest Jurassic-early Cretaceous interval of the Yatria River, subpolar Urals, Siberia. Isotopic compositions have been determined on ...
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(2002)Structural features and composition of Jurassic deposits in the Kafan tectonic block that is located in the southeastern part of the Lesser Caucasus are considered. Three carbonate members bearing foraminifers are distinguished ...
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(2004)The study is devoted to Jurassic gastropods of the Central and Central Chernozem regions of Russia. Thanks to the exact locality data on the collected material, the stratigraphic ranges of many species were refined. Several ...
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(2004)A caddisfly Dolophilodes ( Sortosella ) shurabica subgen. et sp. nov. (Philopotamidae) is described from the Jurassic of Kyrgyzstan, from the Sai-Sagul locality. The ecology and taphonomy of this locality are analyzed, and ...
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(1999)The latitudinal models of radiolarian paleogeographic provinces are considered, and Late Jurassic boreal radiolarian assemblages of Russia are characterized. Several Jurassic radiolarian assemblages from the Koryak Upland ...
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JURASSIC TRACHYBASALT-COMENDITE-ALKALI GRANITE VOLCANO-PLUTONIC ASSOCIATION OF EASTERN TRANSBAIKALIA (1989)Alkali basalt-comendite associations are a typical rock type of rift-generated structures and are known both in continental regions (the Basin and Ridge Province of the U.S., and in Mongolia) and in island-arc regions ...
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(2002)Geologic and paleomagnetic research in the western part of the Omolon massif and in the Sugoi folded zone, northeastern Russia, suggests significant lateral displacements of these units relative to one another and with ...
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(2001)The paper is devoted to the karst role in the formation of aureoles of kimberlite indicator minerals (KIM) and diamond placers in the modern alluvium of the Muna-Markha interfluve. Its territory is open, i.e., the Lower ...
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(2001)The temporal link between mass extinctions and large igneous provinces is well known. Here, we examine this link by focusing on the potential climatic effects of large igneous province eruptions during several extinction ...
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(2004)The Jurassic and Cretaceous are considered to have been warmer than today on the basis of various climate data and model studies. Here, we use the available global record of climate-sensitive sediments, plants, and dinosaurs ...
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(1987)The Chordi Deposit is located in the Oni district, Georgia, among Middle Jurassic volcano-sedimentary rocks on the 'andesite line' of the Gagra-Dzhava structural-metallogenic zone. It consists of a series of steeply dipping ...
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(1996)We studied Lower Jurassic (Pliensbachian-Toarcian) basalts and tuffs and Middle Jurassic (Bajocian) limestones and marls from 9 sites in the southern part of the Lesser Caucasus (ca. 39.3°N, 45.4°E). A component showing ...
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(1989)Igneous activity is a very accurate indicator linking the surface of the Earth to its crust and mantle. Features indicative of the general heterogeneity of the lithosphere include great magmatic 'seams', many thousands of ...
Now showing items 41-60 of 151