Results 21 to 30 of about 5,028 (207)
Ein Museumsdiebstahl vor 144 Jahren
HiN - Alexander von Humboldt im Netz. Internationale Zeitschrift für Humboldt-Studien, 2017 Zu diesem Artikel liegt kein Abstract vor.
Günter Hoppe
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Origin of carbonatites—liquid immiscibility caught in the act
Nature Communications, 2022 Carbonatites are fascinating igneous rocks and their genesis remains enigmatic. Here the authors show that a Ca-rich carbonatite melt formed by liquid immiscibility from a phonolitic magma of the Laacher See volcano in the Eifel, Germany.
Jasper Berndt, Stephan Klemme
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A novel experimental approach to investigate element transport and isotope fractionation of Li and B in pegmatitic systems during fluid–melt interaction [PDF]
European Journal of MineralogyA novel experimental setup was developed to simulate the transport processes of Li and B and their isotopes via a fluid phase in a flux-rich pegmatitic system (1.7 % Li2O, 2.5 % B2O3).
C. R. Singer +5 more
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Cement, 2022 This study presents the influence of different curing temperatures and the availability of unbound H2O on the phase changes during the drying process of a simplified calcium aluminate cement bond castable. A mixture of CAC and alumina was hydrated for 48
A. Koehler +2 more
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Fossil eggshell cuticle elucidates dinosaur nesting ecology [PDF]
PeerJ, 2018 The cuticle layer consisting mainly of lipids and hydroxyapatite (HAp) atop the mineralized avian eggshell is a protective structure that prevents the egg from dehydration and microbial invasions.
Tzu-Ruei Yang +4 more
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Semionotiform fish from the Upper Jurassic of Tendaguru (Tanzania) [PDF]
Fossil Record, 1999 The late Late Jurassic fishes collected by the Tendaguru expeditions (1909–1913) are represented only by a shark tooth and various specimens of the neopterygian Lepidotes.
G. Arratia, H.-P. Schultze
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Quantitative histological models suggest endothermy in plesiosaurs [PDF]
PeerJ, 2018 Background Plesiosaurs are marine reptiles that arose in the Late Triassic and survived to the Late Cretaceous. They have a unique and uniform bauplan and are known for their very long neck and hydrofoil-like flippers.
Corinna V. Fleischle +2 more
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Geology, age and tectonic evolution of the Sierra Maestra Mountains, southeastern Cuba
Geologica Acta, 2006 We summarize the available geological information on the Sierra Maestra Mountains in southeastern Cuba and report new zircon fission track and biotite Ar-Ar ages for this region. Two different and genetically unrelated volcanic arc sequences occur in the
Franz Neubauer +4 more
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ELEMENTE DER MINERALOGIE Wilhelm Wundt Library (-) Elemente der Mineralogie (-
Naumann, Carl Friedrich
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