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Browsing ELibrary by Title
Now showing items 10166-10185 of 21879
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(2004)Athyrisinine brachiopods from the Upper Silurian of Russia and the Lower–Middle Devonian of China and north Vietnam include over 70 species belonging to Athyrisina and Parathyrisina; generic and subfamilial diagnoses are ...
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(2004)Problems of the morphology, evolution, and systematics of the brachiopod family Schrenkiellidae are discussed. A new subfamily, Coopericinae, and a new genus, Coopericus, are established. New genera Krekarpius and Elalia, ...
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(2003)New taxa of the family Tomiidae, Paratomia pectinata gen. et sp. nov., Tomia antiqua sp. nov., T. cancellata sp. nov., T. ramosa sp. nov., T. sennikovi sp. nov., and T. dura sp. nov., are described from the Upper Permian ...
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(2001)The genus Helioplasmolites is revised and only three species are retained, including Hm. dzharensis sp. nov. from the Wenlockian of Northwest Mongolia; ten of the remaining species are transferred to the genera Diploepora, ...
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(2001)The genus Ptychophylloceras from the Berriasian of the Crimea is revised. P. ptychoiciun (Querist.) is considered as a junior synonym off! seinistilcattim (d'Orb.). The suturai ontogeny and inner structure are studied. ...
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(2002)The Choristites priscus group is revised. A neotype of Spirifer priscus Eichwald, 1840 is chosen from the topotype specimens to become a type species of the new subgenus, Choristites (Priskiles). A new species, Ch. ...
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(1999)Representatives of the Kungurian-Ufimian thin-ribbed linoproductoids are described These forms are known to belong to the genus Cancrinella. A new genus, Striapustula, with the type species S. koninckiana (Keyserling) are ...
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(2002)An alternative definition of distance is presented for observations plotted in a ternary diagram and, more generally, for observations in a compositional data set. This definition, which conforms to the triangular coordinate ...
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(1998)This paper reports the alternating field demagnetization characteristics of glass-ceramic magnetite assemblages carrying weak-field thermoremanent magnetization (TRM), weak-field anhysteretic remanent magnetization (ARM), ...
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(2004)This study investigates the magnetic behavior of three well-characterized synthetic single-phase ferrian ilmenite (y = 0.7) specimens over the temperature range between 10 K and 573 K. Careful experiments measuring induced ...
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(2005)Are the rare earth elements (REEs) in foraminifera a valuable proxy for use in paleoceanographic and climate change studies? In order to investigate this, we attempted a comprehensive study of REEs in planktonic and benthic ...
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(1997)We have examined the systematics of Re abundances in concert with new and published data on major and trace elements in oceanic basalts. Re abundances in MORB average 927 ppt (parts per trillion), a factor of 2.6 higher ...
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(1996)The trace elements Re and Mo both behave conservatively in seawater yet are strongly enriched in reducing sediments. Their potential for authigenic enrichment above crustal concentrations is greater than for many other ...
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(1995)Rhenium concentrations were measured in the Black Sea to determine the behavior of this redox-sensitive element in an anoxic basin. Under reducing conditions, Re is removed from solution, leading to its depletion from Black ...
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(2001)Rhenium is found in a great deal of occurrences in the Kuril Islands, apart from the known occurrence at the Kudryavyi volcano. Rhenium mineralisation is located both in the upper parts of the ore-magmatic systems with ...
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(2001)The Re-Os isotopic systematics of calcium-aluminium-rich inclusions (CAIs) in chondrites were investigated in order to shed light on the behavior of the Re-Os system in bulk chondrites, and to constrain the timing of ...
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(2001)This study investigated the rheological and microstructural evolution of Carrara marble deformed to large shear strain to understand how dynamic recrystallization and lattice-preferred orientation (LPO) are related to ...
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(2003)The vesiculation of the rising magma in a volcanic conduit results in a large change in the viscosity of magma. Understanding the effect of bubbles on the viscous behavior of bubble-melt mixtures over a wide range of bubble ...
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(2001)Four different thermo-kinematic models for the tectonic evolution of the convergence zone of the Eastern Carpathians are studied, in which processes like the pre-collisional subduction of an oceanic lithosphere, the ...
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(2004)Lherzolite samples synthesized from fine-grained powders prepared from a natural xenolith were deformed at P = 300?MPa and 1373 ? T ? 1573?K in a high-resolution gas-medium deformation apparatus. Below and above the solidus ...
Now showing items 10166-10185 of 21879