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Showing 33751 to 33800 of 59105 works
Fracture Mechanical Properties of Damaged and Hydrothermally Altered Rocks, Dixie Valley - Stillwater Fault Zone, Nevad…
An edited version of this paper was published by AGU. Copyright (2019) American Geophysical Union. Callahan, O. A., Eichhubl, P., Olson, J. E., & Davatzes, N. C. (2019). Fract…
Towards Improved Predictions in Ungauged Basins: Exploiting the Power of Machine Learning
Long Short-Term Memory (LSTM) networks offer unprecedented accuracy for prediction in ungauged basins. We trained and tested an LSTM on the CAMELS basins (approximately 30 years o…
Imbibition in porous media: correlations of displacement events with pore-throat geometry and the identification of a n…
The displacement of a non-wetting fluid by a wetting fluid in porous media, called imbibition, is important in many natural and industrial processes. During imbibition, the wettin…
Cohesive-Zone Effects in Hydraulic Fracture Propagation
Hydraulic fracture presents an interesting case of crack elasticity and fracture propagation non-linearly coupled to fluid flow. Hydraulic fracture (HF) is often modeled using the…
Accelerating Numerical Wave Propagation by Wavefield Adapted Meshes, Part II: Full-Waveform Inversion
We present a novel full-waveform inversion approach which can reduce the computational cost by up to an order of magnitude compared to conventional approaches, provided that varia…
Communicating with public audiences about the geological subsurface: thinking inside the box.
Community concerns over resource extraction and public anxieties about insertion of waters and waste are creating a growing societal unease about geological exploitation of the su…
Collapse of Eurasian ice sheets 14,600 years ago was a major source of global Meltwater Pulse 1a
Rapid sea-level rise caused by the collapse of large ice sheets is a global threat to human societies. In the last deglacial period, the rate of global sea-level rise peaked at mo…
Bergordnung Herzog Georg von Sachsen 1520
Diese Bergordnung, erlassen im Jahr 1520, wiederholt die 103 Paragrafen der Annaberger Bergordnung aus dem Jahr 1509 sowie die dort aufgeführten Eide. Zusätzlich wurden ihr weiter…
What Fractionates Oxygen Isotopes During Respiration? Insights from Multiple Isotopologues and Theory
The precise mass dependence of respiratory O2 consumption underpins the “oxygen triple-isotope” approach to quantifying gross primary productivity in modern and ancient environmen…
The anelasticity of zinc and its implications for the Earth’s inner core
The Earth’s inner core exhibits significant anisotropy in both seismic velocity and attenuation as well as hemispherical and depth variations. These observations point to an inner…
Quantifying Eulerian Eddy Leakiness in An Idealized Model
An idealized eddy-resolving ocean basin, closely resembling the North Pacific ocean, is simulated using MITgcm. We identify rotationally coherent Lagrangian vortices (RCLVs) and s…
Bergordnungen König Maximilian I. für Schwaz 1505
Am 1. Januar 1505 wurden zwei Bergordnungen erlassen. Die Bergordnung I beinhaltet Anweisungen König Maximilian I. bezüglich der Kontrolle und Bezahlung der Erzscheider. Die Bergo…
Shifting velocity of temperature extremes under climate change
Rapid changes in climatic conditions threaten both socioeconomic and ecological systems, as these might not be able to adapt or to migrate at the same pace as that of global warmi…
Influence of floods, tides, and vegetation on sediment retention in Wax Lake Delta, LA, USA
Sediment is the most valuable natural resource for deltaic environments, and to build new land sediment must be retained in the delta instead of being transported offshore. Despit…
Review paper: The 2nd June 1979 Mw 6.1 Cadoux surface rupturing earthquake, Australia
The 2nd June 1979 moment magnitude (Mw) 6.1 Cadoux earthquake caused a complex, multi-fault surface rupture consisting of six mapped scarps: (from south to north) the 8 km long we…
Review paper: The 10th March 1970 Mw 5.0 Calingiri surface rupturing earthquake, Australia
The 10th March 1970 moment magnitude (Mw) 5.0 Calingiri earthquake surface rupture is 3.3 km long with a maximum vertical displacement of 0.4 m. The fault as defined by surface me…
Review paper: The 30th March 1986 Mw 5.7 Marryat Creek surface rupturing earthquake, Australia
The 30th March 1986 Mw 5.7 Marryat Creek earthquake produced a highly arcuate 13 km long surface rupture with maximum vertical displacement of 0.9 m. Sinistral displacement on the…
Review paper: The 14th October 1968 Mw 6.6 Meckering surface rupturing earthquake, Australia
The 14th October 1968 MW 6.6 Meckering earthquake surface rupture is comprised of a main 37 km long concave Meckering scarp (with a 1.5 km wide dextral step-over along the Burges …
Review paper: The 20th May 2016 Mw 6.1 Petermann surface rupturing earthquake, Australia
The 20th May 2016 Mw 6.1 Petermann earthquake produced a 21 km long surface rupture with a maximum vertical offset of 0.9 m. Geological and geophysical data provide strong evidenc…
Review paper: The 23rd March 2012 Mw 5.2 Pukatja surface rupturing earthquake, Australia
The 23rd March 2012 Mw 5.2 Pukatja earthquake produced an arcuate surface rupture 1.6 km long with a maximum vertical offset of 0.48 m. We reclassify its length to 1 km based on a…
Bergordnung König Maximilian I. für Schwaz 1500
Im Anschluss an die in unregelmäßigen Abständen in Innsbruck stattfindenden Bergsynoden wurden die dort gefassten Beschlüsse in Bergordnungen niedergeschrieben. Diese Bergordnung,…
Frozen fringe explains sediment freeze-on during Heinrich events
Anomalous coarse-grained sediment layers beneath the North Atlantic likely originated from sediment freeze-on to the base of ice sheets during the last glacial period. These layer…
Early Paleocene Paleoceanography and Export Productivity in the Chicxulub Crater
The Chicxulub impact caused a crash in export productivity in much of the world’s oceans which contributed to the extinction of 75% of marine species. In the immediate aftermath o…
Grain-Size and Discharge Controls on Submarine-Fan Depositional Patterns From Forward Stratigraphic Models
Submarine fans are important components of continental margins; they contain a stratigraphic record of environmental changes and host large accumulations of oil and gas. The grain…
Real-Time High-Rate GNSS Displacements: Performance Demonstration During the 2019 Ridgecrest, CA Earthquakes
Traditional real-time seismology has relied on inertial sensors to characterize ground motions and earthquake sources, particularly for hazards applications such as warning system…
Variations in sub-daily precipitation at centennial scale
Short-term precipitation events with high intensities govern the dynamics of numerous fast hydrological processes like flash floods in urban areas and soil erosion in agriculture.…
More than planetary-scale feedback self-regulation: A Biological-centred approach to the Gaia Hypothesis
Recent appraisals of the Gaia theory tend to focus on the claim that planetary life is a cybernetic regulator that would self-regulate Earth’s chemistry composition and climate dy…
Geochemical and geotectonic controls of the metallogenic evolution of selected ophiolite complexes from the Sudan
Im sudanesischen Teil des Arabisch-Nubischen Schildes (Red Sea Hills) konnten mehrere Gesteinsassoziationen, die vorwiegend an ausgeprägte Scherzonen gebunden sind, mittels kombin…
High-resolution terrestrial climate, bioclimate and vegetation for the last 120,000 years
The variability of climate has profoundly impacted a wide range of macroecological processes in the Late Quaternary. Our understanding of these has greatly benefited from palaeocl…
Progradational Slope Architecture and Sediment Partitioning in the Outcropping Mixed Siliciclastic-Carbonate Bone Sprin…
Sediment transport and partitioning are important for understanding slope-building processes in mixed carbonate-siliciclastic sediment routing systems. The Permian-aged Bone Sprin…
Benefits of Automated Navigation for the Roadheader for NATM Tunnels
TUnIS Naviagtion Roadheader, the navigation system that has been developed by VMT GmbH especially for Roadheader provides exact measurement accuracy, top performance and high effi…
Research in Sudan, Somalia, Egypt and Kenya: results of the Special Research Project "Geoscientific Problems in Arid an…
Vol. 120.2: Geoscientific Research in Somalia, Egypt and Kenya 20. DUALEH, A.H.A., REUTHER, C.-D., & SCHECK, P.: Basement structure and sedimentary cover of Somalia . . . 505 ; …
Scale matters: The influence of structural inheritance on fracture patterns
Fracture systems are often geometrically invariant across a range of scales, but the impact of structural inheritance on this relationship is poorly understood. This paper shows h…
Spatial variation of groundwater response to multiple drivers in a depleting alluvial aquifer system, northwestern India
Unsustainable exploitation of groundwater in northwestern India has led to extreme but spatially variable depletion of the alluvial aquifer system in the region. Mitigation and ma…
Empirical Green’s Function Retrieval using Cross-correlation of Ambient Noise Correlations (C2)
Empirical Greens function (EGF) retrieval commonly relies on cross-correlating the long-term ambient seismic wavefield that is simultaneously recorded at multiple stations. Recen…
A century of reduced ENSO variability during the Medieval Climate Anomaly
Climate model simulations of El Niño–Southern Oscillation (ENSO) behavior for the last millennium demonstrate interdecadal to centennial changes in ENSO variability that can arise…
Convergent human and climate forcing of late-Holocene flooding in northwest England
Concern is growing that climate change may amplify global flood risk but short hydrological data series hamper hazard assessment. Lake sediment reconstructions are capturing a ful…
Ammoniten aus dem Callovium/Oxfordium-Grenzbereich von Nordchile
ZUSAMMENFASSUNG Das obere Callovium und untere Oxfordium kann in Nordchile in vielen Profilen nachgewiesen werden. Es lassen sich verschiedene Faunenhorizonte unterscheiden, die …
Climatic patterns over the European Alps during the LGM derived from inversion of the paleo-ice extent
The Quaternary climate has been dominated by alternating glacial and interglacial periods. While the timing and extent of past ice caps are well documented, local variations in te…
The influence of structural inheritance and multiphase extension on rift development, the northern North Sea
The northern North Sea rift evolved through multiple rift phases within a highly heterogeneous crystalline basement. The geometry and evolution of syn-rift depocentres during this…
Mass-transport complexes (MTCs) document minibasin subsidence patterns and diapir evolution in the northern Gulf of Mex…
Mass-transport complexes (MTCs) dominate many salt-influenced sedimentary basins. Commonly in such settings, halokinesis is invoked as the primarily trigger for MTC emplacement. D…
Deep-water reservoir distribution on a salt-influenced slope, Santos Basin, offshore Brazil
Studies of near-seabed datasets show that salt tectonics controls the distribution and architecture of deep-water reservoirs in many salt-influenced basins. It is typically diffic…
Control of heterogeneous, layered successions on shallow-level magma emplacement and host rock deformation
Host rock deformation in active volcanic settings can signal and be used to constrain magma emplacement. Yet it is difficult to evaluate the accuracy of intrusion parameters deriv…
Small baseline InSAR time series analysis: Unwrapping error correction and noise reduction
We present a review of small baseline interferometric synthetic aperture radar (InSAR) time series analysis with a new processing workflow and software implemented in Python, name…
E&P Business Transformation: Reserves – Technology – Information {RTI} Strategy
Reserves (R)– make and break E&P companies. Its value and reliability are THE most valuable asset. The reserves hopper – evolution from Resources to Reserves needs maximum ma…
Realistic and simplified models of plant and leaf area indices for a seasonally dry tropical forest
Leaf Area Index (LAI) models that consider all phenological stages have not been developed for the Caatinga, the largest seasonally dry tropical forest in South America. LAI model…
A mechanistic erosion model for cosmogenic nuclide inheritance in fluvial single-clast exposure ages
Terrestrial cosmogenic nuclides (TCNs), produced by the bombardment of Earth’s surface by cosmic rays, are widely used for age-dating and pacing surface processes. Sediments carry…
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research
Bayesian calibration of the Mg/Ca paleothermometer in planktic foraminifera
The Mg/Ca ratio of planktic foraminifera is a widely-used proxy for sea-surface temperature, but is also sensitive to other environmental factors. Previous work has relied on corr…
Vertical Eddy Iron Fluxes Support Primary Production in the Open Southern Ocean
The primary productivity of the Southern Ocean ecosystem, and associated biological carbon pump, is limited by the availability of the micronutrient iron. Riverine sediments and a…
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