Auflistung Geologie nach Titel
Anzeige der Dokumente 98-117 von 933
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Carbon in tundra soils in the Lake Labaz region of arctic Siberia
(Blackwell Publishing2007-03-29)Large amounts of carbon are stored in permafrost-affected soils of the Arctic tundra. The quantity, distribution and composition of this carbon are important, because much of the carbon is likely to be released as a result ... -
Catshark egg capsules from a Late Eocene deep-water methane-seep deposit in western Washington State, USA
(Acta Palaeontologica Polonica, 2011-11-08)Fossil catshark egg capsules, Scyliorhinotheca goederti gen. et sp. nov., are reported from a Late Eocene deep−water methane−seep calcareous deposit in western Washington State, USA. The capsules are preserved three−dimensionally ... -
Cenozoic Exhumation and Deformation of the Intermontane Pastos Chicos Basin in the Southern Central Andes: Implications for the Tectonic Evolution of the Andean Plateau (Puna) and the Eastern Cordillera Between 23° and 24°S, NW Argentina
(Tectonics, 2023-02-03)The Andean Plateau of north‐western Argentina (Puna) at a mean elevation of ca. 4.2 km constitutes the southern continuation of the Altiplano; it is a compressional basin‐and‐range province comprising fault‐bounded, ... -
Cenozoic Methane-Seep Faunas of the Caribbean Region.
(PloS one, 2015)We report new examples of Cenozoic cold-seep communities from Colombia, Cuba, the Dominican Republic, Trinidad, and Venezuela, and attempt to improve the stratigraphic dating of Cenozoic Caribbean seep communities using ... -
Cenozoic Proxy Constraints on Earth System Sensitivity to Greenhouse Gases
(Paleoceanography and Paleoclimatology, 2022-12-08)The long‐term extent of the Earth system response to anthropogenic interference remains uncertain. However, the geologic record offers insights into this problem as Earth has previously cycled between warm and cold intervals ... -
Central Asian modulation of Northern Hemisphere moisture transfer over the Late Cenozoic
(Communications Earth & Environment, 2021-06-03)Earth’s climatic evolution over the last 5 million years is primarily understood from the perspective of marine mechanisms, however, the role of terrestrial feedbacks remains largely unexplored. Here we reconstruct the ... -
Central uplift collapse in acoustically fluidized granular targets: Insights from analog modeling
(Meteoritics & Planetary Science, 2020)Depending on their sizes, impact craters have either simple or complex geometries. Peak-ring craters such as the Chicxulub impact structure possess a single interior ring of peaks and hills and a flat interior floor. The ... -
Chaetosclera klipsteini n. gen. n. sp. (Halichondriida, Demospongiae) aus dem Unterkarn der Cassianer-Schichten (Dolomiten, Italien)
(Mitteilungen aus dem Geologisch-Paläontologischen Institut der Universität Hamburg, 1989) -
Channelised and open-slope processes of mass sediment transport - their morphological and seismic characterisation from selected Atlantic high productivity regions
(Univ. Bremen, 2005)Sediment transport, high productivity, submarine canyon, submarine slide, excess pore-pressure, weak layers, slope failure. - The study investigates processes of mass sediment transport in two geologically unique Atlantic ... -
Chaotic three-dimensional distribution of Ba, Rb, and Sr in feldspar megacrysts grown in an open magmatic system
(Contributions to Mineralogy and Petrology, 2011)As has been demonstrated in recent years, the heterogeneities of coeval magmas can be more successfully revealed by zoned megacrysts rather than by analysis of the whole rocks hosting them. Here, the geochemical ... -
Characeae-derived carbonate deposits in Lake Ganau, Kurdistan Region, Iraq
(Facies, 2012)Characeae, a family of calcifying green algae, are common in carbonate-rich freshwaters. The southwestern shoreline of Lake Ganau (Kurdistan Region, northeastern Iraq) harbors dense and thick mats of these algae (genus ... -
Characterising the reactivity of metallic iron in Fe0/As-rock/H2O systems by long-term column experiments
(Water SA, 2012)The intrinsic reactivity of four metallic iron materials (Fe0) was investigated in batch and column experiments. The Fe0 reactivity was characterized by the extent of aqueous fixation of in-situ leached arsenic (As). ... -
Characterization of (paleo)lacustrine landforms using sedimentological and portable OSL investigations at Schweriner See, north‐eastern Germany
(Earth Surface Processes and Landforms, 2021-11-03)We investigated four subaerial (paleo)lacustrine landforms at the north‐eastern shoreline of Schweriner See, north‐eastern Germany. These included two beach ridges, one subaerial nearshore bar and a silting up sequence ... -
Characterization of a landslide-triggered debris flow at a rainforest-covered mountain region in Brazil
(Natural Hazards, 2021-05-30)Debris flows represent great hazard to humans due to their high destructive power. Understanding their hydrogeomorphic dynamics is fundamental in hazard assessment studies, especially in subtropical and tropical regions ... -
Characterizing As, Cu, Fe and U solubilization by natural waters
(Uranium, Mining and Hydrogeology, 2008)The effects of carbonate concentration and the presence of in-situ generated iron oxide and hydroxide phases (iron oxyhydroxides) on arsenic (As), copper (Cu), and uranium (U) release from natural rocks were investigated ... -
Characterizing the discoloration of methylene blue in Fe0/H2O systems.
(Journal of hazardous materials, 2009)Methylene blue (MB) was used as a model molecule to characterize the aqueous reactivity of metallic iron in Fe(0)/H(2)O systems. Likely discoloration mechanisms under used experimental conditions are: (i) adsorption onto ... -
Characterizing the effects of shaking intensity on the kinetics of metallic iron dissolution in EDTA.
(Journal of hazardous materials, 2009-10-30)Despite two decades of intensive laboratory investigations, several aspects of contaminant removal from aqueous solutions by elemental iron materials (e.g., in Fe(0)/H2O systems) are not really understood. One of the main ... -
Characterizing the reactivity of metallic iron in Fe0/EDTA/H2O systems with column experiments
(Chemical Engineering Journal, 2010)Characterizing the intrinsic reactivity of iron materials for environmental remediation has received relative little interest. Available results are mostly based on the removal extent of selected contaminants in batch ... -
Characterizing the reactivity of metallic iron in Fe0/UVI/H2O systems by long-term column experiments
(Chemical Engineering Journal, 2011)Aqueous iron corrosion has been identified as a powerful process for environmental remediation and safe drinking water provision. The intrinsic reactivity of conventional micro-scale metallic iron (Fe0) has been mostly ... -
Characterizing the reactivity of metallic iron upon methylene blue discoloration in Fe0/MnO2/H2O systems.
(Journal of hazardous materials, 2009-09-15)A simple method is proposed for testing the reactivity of elemental iron materials (Fe(0) materials) using methylene blue (MB) as reagent. The method is based on the oxidative reactivity of Fe(II) for reductive dissolution ...