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Showing 33451 to 33500 of 59105 works
Extrusion dynamics of deep-water volcanoes
Submarine volcanism accounts for c. 75% of the Earths volcanic activity. Yet difficulties with imaging their exteriors and interiors mean the extrusion dynamics and erupted volume…
The land ice contribution to sea level during the satellite era
Since 1992, there has been a revolution in our ability to quantify the land ice contribution to SLR using a variety of satellite missions and technologies. Each mission has provid…
Increasingly Powerful Tornadoes in the United States
Storm reports show an upward trend in the power of tornadoes from longer and wider paths and higher damage ratings. Quantifying the magnitude of the increase is difficult given di…
On the timing and nature of the multiple phases of slope instability on eastern Rockall Bank, Northeast Atlantic
One of the most challenging tasks when studying large submarine landslides is determining whether the landslide was initiated as a single large event, a chain of events closely sp…
Regional-scale paleobathymetry controlled location, but not magnitude, of tidal dynamics in the Late Cretaceous Western…
Despite extensive outcrop and previous sedimentologic study, the role of tidal processes along sandy, wave- and river-dominated shorelines of the North American Cretaceous Western…
Determination of the Lithosphere-Asthenosphere Boundary using program LABWA2015
Lithosphere-Asthenosphere Boundary (LAB) is a lower boundary of the lithospheric plate, so, it is an important tectonic boundary. We present the package of numerical program LABWA…
The Mesozoic and Palaeozoic granitoids of north-western New Guinea
A large portion of the Birds Head Peninsula of NW New Guinea is an inlier that reveals the pre-Cenozoic geological history of the northern margin of eastern Gondwana. The peninsul…
Growing forced bars determine non-ideal estuary planform
The planform of estuaries is often described with an ideal shape, which exponentially converges in landward direction. We show how growing topographically forced nonmigratory (i.e…
Combined geophysical measurements provide evidence for unfrozen water in permafrost in the Adventdalen valley in Svalba…
Quantifying the unfrozen water content of permafrost is critical for assessing impacts of surface warming on the reactivation of groundwater flow and release of greenhouse gasses …
Identifying causes of ground-penetrating radar reflections using time-domain reflectometry and sedimentological analyses
Ground-penetrating radar (GPR) is a geophysical technique widely used to study the shallow subsurface and identify various sediment features that reflect electromagnetic waves. Ho…
Neue Methode zur Wiederansiedlung von Bult-Torfmoosen (Sphagnum spp.)
Nach der Wiedervernässung industriell abgetorfter Hochmoore entstehen unter günstigen Bedingungen Initialstadien, die von Sphagnum cuspidatum dominiert werden. Allerdings haben di…
Pre-existing basement thrusts influence rifting in the Taranaki Basin, New Zealand
Discrete structures (e.g. faults) or pervasive fabrics (e.g. foliation), which may occur in pre-rift sedimentary and/or crystalline basement rock, can control the growth and geome…
EarthN: A new Earth System Nitrogen Model
The amount of nitrogen in the atmosphere, oceans, crust, and mantle have important ramifications for Earth’s biologic and geologic history. Despite this importance, the history an…
Bedform migration in a mixed sand and cohesive clay intertidal environment and implications for bed material transport …
Many coastal and estuarine environments are dominated by mixtures of non-cohesive sand and cohesive mud. The migration rate of bedforms, such as ripples and dunes, in these enviro…
Die Geologie der Cordillera de la Sal, Nordchile
Die Cordillera de la Sal ist ein schmaler, aber weit in NNE/SSW-Richtung gelängter Faltenzug, der in Nordchile im Westteil des Salar de Atacama-Beckens liegt. Dieses Becken wird d…
Volcanic ash generation mechanisms: Fingerprints in phase distribution highlighted by QEMSCAN particle mineralogical an…
Volcanic ash particle properties depend upon their genetic fragmentation processes. Here, we introduce QEMSCAN particle mineralogical analysis (PMA) to quantify the phase distribu…
Rainfall-Runoff modelling using Long Short-Term Memory (LSTM) networks
Rainfall-runoff modelling is one of the key challenges in the field of hydrology. Various approaches exist, ranging from physically based over conceptual to fully data driven mode…
Late Pliocene marine pCO2 reconstructions from the Subarctic Pacific Ocean
The development of large ice-sheets across the Northern Hemisphere during the late Pliocene and the emergence of the glacial-interglacial cycles that punctuate the Quaternary mark…
Structural Evolution of Salt-Influenced Fold-and-Thrust belts: A Synthesis and New Insights From Basins Containing Isol…
Lateral shortening is expressed in unique ways in salt basins, especially if pre-shortening diapirs are present. We present an overview and new 3-D conceptual models capturing the…
Erster Nachweis einer Turritellide in der Alzey-Formation des Mainzer Beckens
Der erste Nachweis einer Gastropode der Familie Turritellidae aus der Alzey-Formation (Rupelium) einer Fundstelle bei Offenheim im Kreis Alzey wird beschrieben. Die Art wird vorlä…
Nutzung hyperspektraler Messtechnik (Teil 2) - Messtechnik, methodische Ansätze und Anwendungsbeispiele im markscheider…
Der Einsatz hyperspektraler Messtechnik hat in den letzten Jahren in ganz unterschiedlichen Fachdisziplinen immer mehr an Bedeutung gewonnen. In den Geowissenschaften ermöglicht d…
Geologie des Oberharzer Diabaszuges zwischen Lerbach und dem Polsterberg (Mtbl. 4227 Osterode, 4228 Riefensbeek)
Die vorliegende Diplomarbeit stellt eine umfangreiche Kartierung der Geologie des Oberharzer Diabaszuges zwischen Lerbach und dem Polsterberg dar. Ausgehend von einem kurzen Überb…
Tongeologische Entwicklungstrends in kretazischen und tertiären Sedimenten Nordostafrikas: regionale Fallbeispiele
Die lateralen Verteilungen der Tonmineralassoziationen der kretazischen und paläogenen Sedimente Südostägyptens spiegeln die Verbreitung der periodischen Meeresvorstöße dieses Zei…
Variability of Net Radiation on Snow-Covered Forest Floor for a Range of Vegetation Densities along a Latitudinal Trans…
Net radiation reaching the forest floor is influenced by vegetation density. Previous studies have confirmed that in mid-latitude conifer forests in Greenville, ME (45.5°N), net r…
Rivers, reefs, and deltas; Geomorphological evolution of the Jurassic of the Farsund Basin, offshore southern Norway
In many petroleum-bearing, data-poor ‘frontier’ basins, source, reservoir, and seal distribution is poorly constrained, making it difficult to identify petroleum systems and play …
Tracking CO2 plumes in clay-rich rock by distributed fiber optic strain sensing (DFOSS): a laboratory demonstration
Monitoring the migration of pore pressure, deformation, and saturation plumes with effective tools is important for the storage and utilization of fluids in underground reservoirs…
Strain budget of the Ecuador-Colombia subduction zone: a stochastic view
The 2016 Pedernales earthquake (Mw=7.8) ruptured a portion of the Colombia-Ecuador subduction interface where several large historical earthquakes have been documented since the g…
Plants and Drought in a Changing Climate
Purpose of review: Climate is changing in response to rising concentrations of atmospheric CO2 and it is commonly asserted that this will cause droughts to become more frequent an…
Controls on early‐rift geometry: new perspectives from the Bilila‐Mtakataka fault, Malawi
This study investigates the controls to fault and rift geometry for a young rift system. Our case study is a large fault in southern Malawi. The geometry of the fault at the surfa…
Bimodal or quadrimodal? Statistical tests for the shape of fault patterns
Natural fault patterns, formed in response to a single tectonic event, often display significant variation in their orientation distribution. The cause of this variation is the su…
Strain analysis of a seismically-imaged mass-transport complex, offshore Uruguay
Strain style, magnitude, and distribution within mass-transport complexes (MTCs) is important for understanding the process evolution of submarine mass flows and for estimating th…
Marine and freshwater micropearls: Biomineralization producing strontium-rich amorphous calcium carbonate inclusions is…
The genus Tetraselmis (Chlorophyta) includes more than 30 species of unicellular micro-algae that have been widely studied since the description of the first species in 1878. Tetr…
Sedimentary Architecture of an Ancient Linear Megadune (Barremian, Neuquén Basin): Insights into the Long-Term Developm…
Linear aeolian bedforms are the most abundant bedform type in modern Earth sand seas and are very common in our Solar System. Despite their abundance, the long-term development of…
Present-day stress orientations in the Great Sumatran Fault in North Sumatra
Trench-parallel strike slip faults develop at lithospheric scale during oblique high-angle subduction. A “sliver” plate forms due to slip partitioning between the subduction plane…
Geochemie und Geochronologie frühmesozoischer Tholeiite aus Zentral-Marokko
Die vorliegende Arbeit befaßt sich mit der Geochemie, insbesondere der Isotopengeochemie, und der Geochronologie quarznormativer Tholeiite aus der Bohrung Haute Moulouya 2 (HM 2) …
The relationships between regional Quaternary uplift, deformation across active normal faults and historical seismicity…
In order to investigate deformation within the upper plate of the Calabrian subduction zone we have mapped and modelled a sequence of Late Quaternary palaeoshorelines tectonically…
Spatial association between regionalizations using the information-theoretical V-measure
There is a keen interest in inferring spatial associations between different variables spanning the same study area. We present a method for quantitative assessment of such associ…
Unsupervised clustering of Southern Ocean Argo float temperature profiles
The Southern Ocean has complex spatial variability, characterized by sharp fronts, steeply tilted isopycnals, and deep seasonal mixed layers. Methods of defining Southern Ocean sp…
Geochemistry and origin of the Neoproterozoic Natkusiak Flood Basalts and related Franklin Sills, Victoria Island, Arct…
The Natkusiak continental flood basalts and Franklin sills of Victoria Island preserve an exceptional record of the ca. 716–723 Ma Franklin large igneous province and are synchron…
Detecting lightning infrasound using a high-altitude balloon
Acoustic waves with a wide range of frequencies are generated by lightning strokes during thunderstorms, including infrasonic waves (0.1 to 20 Hz). The source mechanism for these …
Der Hohe Meißner in Hessen: Ergebnisse geologischer und geomorphologischer Forschungen
Vorwort . . . 1 ; MAIER, B.: Kartographische Herstellung der geologischen Karte des Hohen Meißners . . . 5 ; JACOBSHAGEN, V., KUHNERT, C. & WYCISK, P.: Geologie des Hohen Meißne…
Stochastic, empirically‐informed model of landscape dynamics and its application to deforestation scenarios
Land change including deforestation undermines the sustainability of the environment. Using data on 1992‐2015 pattern change in over 1.7 million meso‐scale landscapes worldwide we…
Seismic reflection data reveal the 3D structure of the newly discovered Exmouth Dyke Swarm, offshore NW Australia
Dyke swarms are common on Earth and other planetary bodies, comprising arrays of dykes that can extend laterally for 10’s to 1000’s of kilometres. The vast extent of such dyke swa…
Glacial cooling and climate sensitivity revisited
The Last Glacial Maximum (LGM), one of the best-studied paleoclimatic intervals, offers a prime opportunity to investigate how the climate system responds to changes in greenhouse…
Back-propagating super-shear rupture in the 2016 Mw7.1 Romanche transform fault earthquake
How an earthquake rupture propagates strongly influences potentially destructive ground shaking. Complex ruptures often involve slip along multiple faults, masking information on …
Fault-zone damage promotes pulse-like rupture and back-propagating fronts via quasi-static effects
Damage zones are ubiquitous components of faults that may affect earthquake rupture. Simulations show that pulse-like rupture can be induced by the dynamic effect of waves reflect…
Effects of aseismic ridge subduction on geochemistry of frontal arc magmas
Aseismic ridge subduction is considered to exert major controls on volcanic activity, formation of porphyry Cu-Au deposits and the generation of juvenile Earth’s crust. Yet, there…
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