Auflistung Geologie nach Titel
Anzeige der Dokumente 876-895 von 931
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Trace elements and cathodoluminescence of quartz in stockwork veins of Mongolian porphyry-style deposits
(Mineralium Deposita, 2010)The combination of scanning electron microscope–cathodoluminescence (CL), fluid inclusion analysis and high-resolution electron probe microanalysis of Al, Ti, K and Fe in vein quartz has yielded results permitting a greater ... -
Trachyte weathering in the urban built environment related to air quality
(Heritage Science, 2017)Decay of trachyte used as building stone in urban environment was investigated through the analysis of crusts and patinas found on trachyte of the Euganean Hills in the Renaissance city walls of Padua, northeastern Italy. ... -
Tracing southern Gondwanan sedimentary paths: A case study of northern Namibian late Palaeozoic sedimentary rocks
; ; ; ; ; (Sedimentology, 2022-02-15)
The northern Namibian Karoo‐aged successions are part of a Gondwana‐wide sedimentary system emerging at the Carboniferous–Permian boundary and existing for more than 50 Ma. The Karoo Supergroup sedimentary successions are ... -
Tracing the oxygen isotope composition of the upper Earth's atmosphere using cosmic spherules
; Höweling, Andres; ; Stefanak, Maren T.; Beck, Anne-Katrin; Peters, Stefan T. M.; Sengupta, Sukanya; Herwartz, Daniel; Folco, Luigi (Nature communications, 2017-06-01)
Molten I-type cosmic spherules formed by heating, oxidation and melting of extraterrestrial Fe,Ni metal alloys. The entire oxygen in these spherules sources from the atmosphere. Therefore, I-type cosmic spherules are ... -
Tracking Downstream Variability in Large Grain‐Size Distributions in the South‐Central Andes
; (Journal of Geophysical Research: Earth Surface, 2021-08-26)
Mixed sand‐ and gravel‐bed rivers record erosion, transport, and fining signals in their bedload size distributions. Thus, grain‐size data are imperative for studying these processes. However, collecting hundreds to thousands ... -
Transient Creep of Quartz and Granulite at High Temperature Under Wet Conditions
; ; (Journal of Geophysical Research: Solid Earth, 2023-10-05)
Abstract Transient creep of crustal rocks is important to explain time‐dependent geological ...
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Turning the Orogenic Switch: Slab‐Reversal in the Eastern Alps Recorded by Low‐Temperature Thermochronology
; ; Büttner, Lukas; ; (Geophysical Research Letters, 2021-03-15)
Many convergent orogens, such as the eastern European Alps, display an asymmetric doubly vergent wedge geometry. In doubly vergent orogens, deepest exhumation occurs above the retro‐wedge. Deep‐seismic interpretations ... -
Two new species of megasporangiate Sigillariostrobus Schimper (Sigillariostrobaceae) fructifications from the British Coal Measures
(Fossil Record, 2015)The arborescent lycophyte group known as the sigillarians bore pedunculate fructifications, including Sigillariostrobus Schimper, which has a known propensity to disaggregate, making comparisons of cones and in situ ... -
Understanding Forest Health with Remote Sensing - Part I - A Review of Spectral Traits, Processes and Remote-Sensing Characteristics
(Remote Sensing, 2016)Anthropogenic stress and disturbance of forest ecosystems (FES) has been increasing at all scales from local to global. In rapidly changing environments, in-situ terrestrial FES monitoring approaches have made tremendous ... -
Understanding Forest Health with Remote Sensing-Part II—A Review of Approaches and Data Models
(Remote Sensing, 2017)Stress in forest ecosystems (FES) occurs as a result of land-use intensification, disturbances, resource limitations or unsustainable management, causing changes in forest health (FH) at various scales from the local to ... -
Unterkambrischer Sandstein mit kegelförmigen organischen Strukturen des Conichnus-Typs – ein Fundbericht
(Neubrandenburger Geologische Beiträge; Vol.12)Es wird ein unterkambrisches Sandsteingeschiebe von Rügen mit 14 kegelförmigen Strukturen vom Conichnus-Typ in Vergesellschaftung mit dem Spurenfossil Monocraterion vorgestellt. -
Untersuchung zum Zusammenhang zwischen Gesteinsfestigkeitseigenschaften und Kenngrößen der Gesteinszerstörung durch einzelne Bohrzähne zur Beschreibung des Bohrens mit Rollenbohrwerkzeugen
(2006)Im Rahmen einer Literaturauswertung wurde erkannt, dass die in Bohrformeln genutzten Gesteinsparameter mit der Gesteinsdruckfestigkeit und mit der spezifischen Energie für die Gesteinszerstörung korreliert. Numerische ... -
Upper Cretaceous Gosau deposits of the Apuseni Mountains (Romania) - similarities and differences to the Eastern Alps
; Schuller, Volker; Frisch, Wolfgang; DANIŠÍK, Martin; Melinte, Mihaela Carmen (Austrian Journal of Earth Sciences [untranslated], 2009)
The Apuseni Mountains were formed during Late Cretaceous convergence between the Tisia and the Dacia microplates as part of the Alpine orogen. The mountain range comprises a sedimentary succession similar to the Gosau ... -
Upper Plate Controls on the Formation of Broken Foreland Basins in the Andean Retroarc Between 26°S and 28°S: From Cretaceous Rifting to Paleogene and Miocene Broken Foreland Basins
; ; Del Papa, C.; (Geochemistry, Geophysics, Geosystems, 2020)
Marked along-strike changes in stratigraphy, mountain belt morphology, basement exhumation, and deformation styles characterize the Andean retroarc; these changes have previously been related to spatiotemporal variations ... -
Upscaling Sediment‐Flux‐Dependent Fluvial Bedrock Incision to Long Timescales
(Journal of Geophysical Research: Earth Surface, 2021-05-12)
Fluvial bedrock incision is driven by the impact of moving bedload particles. Mechanistic, sediment‐flux‐dependent incision models have been proposed, but the stream power incision model (SPIM) is frequently used to model ... -
Upward‐Doming Zones of Gas Hydrate and Free Gas at the Bases of Gas Chimneys, New Zealand's Hikurangi Margin
; ; ; ; ; ; ; ; ; (Journal of Geophysical Research: Solid Earth, 2021-09-21)
Focused gas migration through the gas hydrate stability zone in vertical gas conduits is a global phenomenon. The process can lead to concentrated gas hydrate formation and seafloor gas seepage, which influences seafloor ... -
Using a Paleosurface to Constrain Low-Temperature Thermochronological Data: Tectonic Evolution of the Cuevas Range, Central Andes
; ; ; ; (Tectonics, 2019)
Dispersion of low-temperature thermochronologic data from nine samples collected on a deformed paleosurface preserved on the Cuevas range (Central Andes) can be exploited to unravel complex thermal histories. The nine ... -
Über 50 Jahre Schwerpunktbibliothek für die überregionale Informationsversorgung der Geowissenschaften - vom systematischen Zettelkatalog zur verteilten Virtuellen Fachbibliothek GEO-LEO
(Universitätsverlag Göttingen2005-05)Der Aufsatz beschreibt die geowissenschaftlichen Sondersammelgebiete der Niedersäschsischen Staats- und Universitätsbibliothek Göttingen und die Entwicklungsgeschichte internetbasierter Informationssysteme für die ...
