Auflistung Geologie nach Titel
Anzeige der Dokumente 618-637 von 933
-
On the Role of Rheological Memory for Convection‐Driven Plate Reorganizations
(Geophysical Research Letters, 2022-09-21)Understanding the temporal variability of plate tectonics is key to unraveling how mantle convection transports heat, and one critical factor for the formation and evolution of plate boundaries is rheological “memory,” ... -
On the Sensitivity of the Devonian Climate to Continental Configuration, Vegetation Cover, Orbital Configuration, CO 2 Concentration, and Insolation
(Paleoceanography and Paleoclimatology, 2019)During the Devonian (419 to 359 million years ago), life on Earth witnessed decisive evolutionary breakthroughs, most prominently the colonization of land by vascular plants and vertebrates. However, it was also a period ... -
On the suitability of admixing sand to metallic iron for water treatment
(International Journal of Environmental Pollution and Solutions, 2013)This communication clarifies the relationships between sand addition and the sustainability of iron/water systems for environmental remediation. It is shown that any enhanced contaminant removal in an iron/sand/water ... -
On the temperature dependence of H-U iso in the riding hydrogen model
(Acta Crystallographica Section A Foundations and Advances, 2014)The temperature dependence of H-Uiso in N-acetyl-l-4-hydroxyproline monohydrate is investigated. Imposing a constant temperature-independent multiplier of 1.2 or 1.5 for the riding hydrogen model is found to be inaccurate, ... -
On the Validity of Specific Rate Constants (kSA) in Fe0/H2O Systems
(Journal of Hazardous Materials, 2008)The validity of the specific reaction rate constants (k(SA)) in modelling contaminant removal in Fe-0/H2O systems is questioned. It is shown that the current k(SA)-model does not consider the large reactive surface area ... -
Opportunities and Challenges for Paleoaltimetry in “Small” Orogens: Insights From the European Alps
(Geophysical Research Letters, 2020-02-10)Many stable isotope paleoaltimetry studies have focused on paleoelevation reconstructions of orogenic plateaus such as the Tibetan or Andean Plateaus. We address the opportunities and challenges of applying stable isotope ... -
Optimising the Design of Fe0-Based Filtration Systems for Water Treatment: The Suitability of Porous Iron Composites
(Journal of Applied Solution Chemistry and Modeling, 2013-08-31)This study assessed the functionality of metallic iron (Fe0) filtration systems using porous iron composite (PIC) as an alternative to granular Fe0/aggregate mixtures. The usage of PIC for water treatment has many challenges ... -
Optimized extraction of dimension stone blocks
(Environmental Earth Sciences, 2010)The profitable production of dimension stone mainly depends on the extractable block size. The regularity and volume of the blocks are of critical importance, and are controlled by the three-dimensional pattern of the ... -
Organic molecular markers and signature from wood combustion particles in winter ambient aerosols: aerosol mass spectrometer (AMS) and high time-resolved GC-MS measurements in Augsburg, Germany
(Atmospheric Chemistry and Physics, 2012)The impact of wood combustion on ambient aerosols was investigated in Augsburg, Germany during a winter measurement campaign of a six-week period. Special attention was paid to the high time resolution observations ... -
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
(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 ... -
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 ... -
Oxygen and Carbon Isotope Variations in a Modern Rodent Community – Implications for Palaeoenvironmental Reconstructions
(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 ... -
Oxygenic photosynthesis as a protection mechanism for cyanobacteria against iron-encrustation in environments with high Fe(2+) concentrations.
(Frontiers in microbiology, 2014) -
Paired 10Be sampling of polished bedrock and erratic boulders to improve dating of glacial landforms: an example from the Western Alps
(Earth Surface Processes and Landforms, 2020)Cosmogenic nuclide dating of glacial landforms may lead to ambiguous results for ice retreat histories. The persistence of significant cosmogenic concentrations inherited from previous exposure may increase the apparent ... -
Palaeoenvironmental evolution of the Tunisian carbonate platform margin - response to global oceanographic and climatic changes (Barremian-Aptian)
(Univ. Bremen, 2008)The Late BarremianLate Aptian interval was characterised by several major changes in the ocean/climate system related to the onset of the Mid-Cretaceous greenhouse world. North Africansedimentary deposits offer excellent ... -
Paleopedological record along the loess-paleosol sequence in Oberlaab, Austria
(E&G – Quaternary Science Journal; Vol.62)A detailed study of a loess-paleosol sequence in Oberlaab, Upper Austria, is presented with emphasis on macro- and micromorphological features, grain size distribution, rock magnetism properties, and weathering degree that ... -
Paleo‐denudation rates suggest variations in runoff drove aggradation during last glacial cycle, Crete, Greece
(Earth Surface Processes and Landforms, 2022-11-13)Fluvial aggradation and incision are often linked to Quaternary climate cycles, but it usually remains unclear whether variations in runoff or sediment supply or both drive channel response to climate variability. Here we ... -
Paleo‐Hydrogeological Modeling to Understand Present‐Day Groundwater Salinities in a Low‐Lying Coastal Groundwater System (Northwestern Germany)
(Water Resources Research, 2023-04-14)Groundwater abstraction and drainage are considered to be the main drivers for the salinization of low‐lying coastal groundwater systems, while the role of past boundary conditions is less clear. In this study, 3‐D ...