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Now showing items 61-80 of 228
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(1990)Although olivine is commonly formed in metamorphic and metasomatic processes, cases of its crystallization from hydrothermal solutions are extremely rare. In these cases the hydrothermal nature of the olivine is inferred ...
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(1999)Data are presented on the Kurga polyphase intrusion, which is located within the Kola alkaline province in the northeastern Baltic Shield. The rock assemblages composing the intrusion are demonstrated to be unique to the ...
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(2001)Significant investigators and aspects in the past century of insect paleontology are briefly reviewed. Despite the pervasive influence of the paleoentomologist Willi Hennig in systematic biology, the study of fossil insects ...
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(2002)The Ural mountains preserve a late Palaeozoic collision that forms a 2500 km suture in the world's largest landmass, Eurasia. Several features of the mountain belt, in particular a well-preserved crustal root, are ...
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(1990)The isotopic makeup of carbon in marine carbonates exhibits quasiperiodic variations in time. Since these changes were controlled by the global balance of organic and carbonate carbon in the oceans, reliably dated isotope ...
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(2001)Over 18,000 joint orientations were measured from a spectrum of lithologies of various ages at natural exposures in the Central Kyzyl Kum region. For each exposure, we plotted joint orientation diagrams and identified local ...
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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)Сделана попытка количественно оценить химический состав и объемы мантии, активизация которой привела к формированию в палеозое в северо-восточной части Балтийского щита Кольской щелочной провинции. В отличие от известных ...
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(2004)The present kinematic and dynamic analysis of large-scale strike-slip faults, which enabled the formation of a collage of Altai terranes as a result of two collisional events. The Late Devonian–Early Carboniferous collision ...
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(1999)Stratigraphic and facies distribution of radiolarians within the interval from the Gzhelian Stage of the Upper Carboniferous to the Kungurian Stage of the Lower Permian in the Cis-Ural foredeep are considered. The interrelation ...
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LITHOSTRATIGRAPHIC CHARACTERISTIC AND LITHOLOGY OF TRIASSIC-PALEOZOIC ROCKS OF SOUTHERN MANGYSHLAK (2004)The paper considers principles of the subdivision and correlation and a new petrographic model of Triassic–Paleozoic rocks based on their lithogenetic features. The structure of the folded basement and quasi-platform complex ...
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(2002)Lower Paleozoic platform carbonate strata in northern Alaska (parts of the Arc-tic Alaska, York, and Seward terranes; herein called the North Alaska carbonate plat-form) and central Alaska (Farewell terrane) share distinctive ...
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(2003)The Middle Paleozoic Maksyutov Complex is an important component of the Eurasian collisional orogeny. It consists of dominant mica-rich garnet schist and mica-poor quartzofeldspathic gneiss enclosing minor mafic eclogite ...
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(2001)All of the available data describing the Earth’s magnetic field in Northern, Western, and Eastern Europe (c. 3 × 106 data points) are compiled and presented at a scale of 1:20 400 000. The compilation meets two requirements ...
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(2003)Paleosols formed by weathering and plant colonization during breaks in eolian deposition of Quaternary loesses are marked by enhanced magnetic susceptibility. These paleosols can be recognized in the field from their soil ...
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(1983)Linear extensional rift and rift-like structures have been generated many times during various periods of the Earth's history since early times. These structures have varied with time, however, in scale, morphology, ...
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(1999)The Urals is one of the most important regions in the world for the occurrence of volcanogenic massive sulphide deposits. Here are found 90 deposits of this type: 32 of them are worked out already, 16 are being worked now, ...
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(1999)The specific features of the Central-Asian orogenic belt (CAOB) and marginal structures of the North-Asian craton are considered on the basis of analysis of lithospheric-plate tectonics and terrain analysis. The general ...
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(2001)The Paleozoic fold-and-thrust belt, confined between the European, Siberian, Tarim, and North China Precambrian continents, results from a complex evolution of the Paleo-Asian Ocean. At the end of the Ordovician, the ...
Now showing items 61-80 of 228