Auflistung Geologie nach Titel
Anzeige der Dokumente 93-112 von 933
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Cambrian sedimentary dykes in the Proterozoic basement of the Västervik area (southeast Sweden): episodic formation inferred from macro- and microfabrics
(International Journal of Earth Sciences, 2010)Fabrics of Cambrian sedimentary dykes formed in Proterozoic granites of the Västervik area (Southeast Sweden) evidence repeated opening/filling and mineralisation/cementation events under varying conditions. Diagnostic ... -
Can Offshore Meteoric Groundwater Generate Mechanical Instabilities in Passive Continental Margins?
(Journal of Geophysical Research: Earth Surface, 2023-02-26)Offshore meteoric groundwater (OMG) has long been hypothesized to be a driver of seafloor geomorphic processes in continental margins worldwide. Testing this hypothesis has been challenging because of our limited understanding ... -
Capillary, Film, and Vapor Flow in Transient Bare Soil Evaporation (1): Identifiability Analysis of Hydraulic Conductivity in the Medium to Dry Moisture Range
(Water Resources Research, 2021-05-13)Evaporation experiments are frequently used to determine soil hydraulic properties. We simulated laboratory evaporation experiments with a coupled water, vapor, and heat flow model which includes the surface energy balance. ... -
Capillary, Film, and Vapor Flow in Transient Bare Soil Evaporation (2): Experimental Identification of Hydraulic Conductivity in the Medium to Dry Moisture Range
(Water Resources Research, 2021-05-13)Bare‐soil evaporation involves coupled flow of liquid water, water vapor, and heat. As evaporation results in non‐isothermal conditions in the soil, the temperature dependence of transport properties and thermal fluxes of ... -
Carbon Dioxide and Methane Release Following Abrupt Thaw of Pleistocene Permafrost Deposits in Arctic Siberia
(Journal of Geophysical Research: Biogeosciences, 2021-11-01)The decomposition of thawing permafrost organic matter (OM) to the greenhouse gases (GHG) carbon dioxide (CO2) and methane forms a positive feedback to global climate change. Data on in situ GHG fluxes from thawing permafrost ... -
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 ...