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Anzeige der Dokumente 4692-4711 von 6904
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Orogen-scale transpression accounts for GPS velocities and kinematic partitioning in the Southern Andes
; ; (Communications Earth & Environment, 2021-08-19)
The Southern Andes are regarded as a typical subduction orogen formed by oblique plate convergence. However, there is considerable uncertainty as to how deformation is kinematically partitioned in the upper plate. Here we ... -
Os, Sr, Nd, Pb, O isotope and trace element data from the Ferrar flood basalts, antarctica: evidence for an enriched subcontinental lithospheric source
Molzahn, M.; Reisberg, L.; (Earth and Planetary Science Letters, 1996)
Os, Sr, Nd, Pb and O isotopes and trace element data are reported for basaltic andesite and andesite whole rocks and, in part, for selected mineral separates from the Jurassic Ferrar flood basalt province. Radiogenic Sr ... -
Osteologische Untersuchungen an Pseudosciuriden (Rodentia, Theridomorpha) des süddeutschen Alttertiärs
(Mainzer geowissenschaftliche Mitteilungen; 21. 1992)Die Arbeit stellt Untersuchungen des postcranialen Skeletts der vier Pseudosciuriden- Arten Pseudosciurus suevicus, Suevosciurus ehingensis, Suevosciurus fraasi und Suevosciurus dehmi aus süddeutschen Spaltenfüllungen ... -
Otolithen aus dem Unter-Pliozän von Süd-Sizilien und aus der Toscana
(Reimer, Berlin, 1978)
Aus altersmäßig nur geringfügig unterschiedlichen Ablagerungen des Unter-Pliozän von Süd-Sizilien, von Fundstellen in der Umgebung der Städte Agrigent, Porto Empedocle und Sciacca, und aus der Toscana, von Fundstellen bei ... -
Overcoming the Model‐Data‐Fit Problem in Porous Media: A Quantitative Method to Compare Invasion‐Percolation Models to High‐Resolution Data
; ; ; ; (Water Resources Research, 2021-07-13)
Invasion percolation (IP) models offer a computationally inexpensive way to simulate multiphase flow in porous media, but only very few studies have compared their results to actual laboratory experimental image data. One ... -
Overlooked Implication of Sediment Transport at Low Flow: Migrating Ripples Modulate Streambed Phototrophic and Heterotrophic Microbial Activity
; Mendoza‐Lera, Clara; Mutz, Michael; Risse‐Buhl, Ute (Water Resources Research, 2021-03-17)
Sandy streambeds are mobile even at low flow velocities at which sediments can be transported as bedload, more specifically as migrating ripples. Small variations in discharge can result in transitions between sediment ... -
Oxidativer Torfverzehr in Niedermoor in Abhängigkeit vom Klima und mögliche Schutzmaßnahmen
(TELMA - Berichte der Deutschen Gesellschaft für Moor- und Torfkunde; Band 08; 1978)Einleitend werden Ursachen und Ausmaß der Höhenverluste im Niedermoor aufgezeigt (Abb. 1). Ferner wird der oxidative Torfverzehr in Abhängigkeit vom Klima mittels Regenfaktor nach LANG (1915) dargelegt (Abb. 2). Feldmessungen ... -
Oxygen and Carbon Isotope Variations in a Modern Rodent Community – Implications for Palaeoenvironmental Reconstructions
Gehler, Alexander; Tütken, Thomas; (PLoS ONE, 2012-11-19)
Background: The oxygen (d18O) and carbon (d13C) isotope compositions of bioapatite from skeletal remains of fossil mammals are well-established proxies for the reconstruction of palaeoenvironmental and palaeoclimatic ... -
Oxygen Consumption of Resuspended Sediments of the Upper Elbe Estuary: Process Identification and Prognosis
; ; ; ; (Aquatic Geochemistry, 2021-11-30)
The resuspension of sediment leads to an increased release of nutrients and organic substances into the overlying water column, which can have a negative effect on the oxygen budget. Especially in the warmer months with a ... -
Oxygen Dependent Temperature Regulation of Benthic Fluxes in Reservoirs
; ; ; ; (Global Biogeochemical Cycles, 2023-04-02)
Temperature and dissolved oxygen concentration are critical factors affecting the exchange of solutes between sediment and water; both factors will be affected by warming of lakes and thereby influence water quality. ... -
Oxygen isotope fractionation in marine aragonite of coralline sponges
Böhm, Florian;; ; ; Lehnert, Helmut; ; (Geochimica et cosmochimica acta, 2000)
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Oxygen isotope fractionation in marine aragonite of coralline sponges
Böhm, Florian;; ; ; Lehnert, Helmut; ; (Geochimica et cosmochimica acta, 2000)
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Oxygen Vacancy Ordering in Aluminous Bridgmanite in the Earth's Lower Mantle
; ; Siegel, Renée; ; ; ; (Geophysical Research Letters, 2019)
Oxygen vacancies (OVs), that charge-balance the replacement of octahedrally coordinated Si4+ by Al3+ in the mineral bridgmanite, will influence transport properties in the lower mantle but little is known about their ... -
Oxygen Vacancy Substitution Linked to Ferric Iron in Bridgmanite at 27 GPa
; ; ; (Geophysical Research Letters, 2020)
Ferric iron can be incorporated into the crystal structure of bridgmanite by either oxygen vacancy substitution (MgFeO2.5 component) or charge-coupled substitution (FeFeO3 component) mechanisms. We investigated the ... -
Oxygenic photosynthesis as a protection mechanism for cyanobacteria against iron-encrustation in environments with high Fe(2+) concentrations.
(Frontiers in microbiology, 2014) -
Ozon- und Wasserdampfverteilung im polaren Strahlstrom über dem Nordatlantik
(Univ. Köln, 1998) -
Ozone depletion, chlorine activation and water vapor observed in Spitsbergen
(Univ. Bremen, 2002) -
Ökohydrologische Aspekte zur Erhaltung von Moorgewässern
(TELMA - Berichte der Deutschen Gesellschaft für Moor- und Torfkunde; Band 10; 1980)Von 186 natürlichen Gewässern im Flachland Niedersachsens liegen 48 % in Mooren und Anmooren. Auch die drei größten Binnenseen Steinhuder Meer, Dümmer und Zwischenahner Meer sind von Mooren umgeben. Die Erhaltung und ... -
Ökologie, Taxonomie und Verbreitung der nichtmarinen Ostrakoden-Gattung Scottia im Quartär von Europa
(E&G – Quaternary Science Journal; Vol.22, No. 1)Scottia browniana (Jones 1850) Brady & Norman 1889 war bisher als einziger Vertreter der Gattung Scottia aus dem Quartär von Europa bekannt. Die Art wurde zuerst fossil in Sedimenten des Mittel- und Altpleistozäns gefunden. ...
