Geologie: Recent submissions
Anzeige der Dokumente 651-675 von 933
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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 ... -
Frugivorous bats drink nutrient- and clay-enriched water in the Amazon rain forest: support for a dual function of mineral-lick visits
(Journal of Tropical Ecology, 2013)In Central Amazonia, large mammals create water-filled puddles when consuming soil. These mineral licks are visited by pregnant and lactating frugivorous bats; possibly for two reasons. Frugivorous bats could supplement their ... -
A new calcitic Sphinctozoan sponge belonging to the demospongiae from the Cassian formation (Lower Carnian; Dolomites, northern Italy) and its phylogenetic relationship
(Geobios, 1987)A new species of a coralline sponge, Cassianothalamia zardinii n. gen. n.sp., from the Lower Carnian Cassian Beds (northern Italy) is described. The new species possesses a secondary thalamid basal skeleton with a ... -
Petrographical and petrophysical properties of sandstones: statistical analysis as an approach to predict material behaviour and construction suitability
(Environmental Earth Sciences, 2012)Most studies dealing with material properties of sandstones are based on a small data set. The present study utilizes petrographical and petrophysical data from 22 selected sandstones and ~300 sandstones from the literature ... -
On the suitability of admixing sand to metallic iron for water treatment
(International Journal of Environmental Pollution and Solutions, 2013)This communication clarifies the relationships between sand addition and the sustainability of iron/water systems for environmental remediation. It is shown that any enhanced contaminant removal in an iron/sand/water ... -
Development and assessment of protective winter covers for marble statuaries of the Schlossbrücke, Berlin (Germany)
(Environmental Earth Sciences, 2010)The present study documents the results of an inter-disciplinary model project that was planned with the aim of developing an innovative winter covering system for marble statuaries located on the Schlossbrücke (Berlin). ... -
Quality assessment of replacement stones for the Cologne Cathedral: mineralogical and petrophysical requirements
(Environmental Earth Sciences, 2011)Owing to its long building history, different types of building stones comprised the construction of the Cologne Cathedral. Severe damage is observed on the different stones, e.g., sandstones, carbonate, and volcanic rocks, ... -
Influence of shape fabric and crystal texture on marble degradation phenomena: simulations
(Environmental Earth Sciences, 2010)Microstructure-based finite element simulations were used to study the influence of grain shape fabric and crystal texture on thermoelastic responses related to marble degradation phenomena. Calcite was used as an illustrative ... -
Natural building stones of Mexico–Tenochtitlán: their use, weathering and rock properties at the Templo Mayor, Palace Heras Soto and the Metropolitan Cathedral
(Environmental Earth Sciences, 2011)In the Aztec period and in colonial times different natural stones originating in the Valley of Mexico were used for building construction. Stone weathering was investigated onsite at various historical buildings within ... -
Ascomycete fungi on dimension stone of the “Burg Gleichen”, Thuringia
(Environmental Earth Sciences, 2011)In the present study, the diversity of ascomycete fungi was investigated on two wall areas of the “Burg Gleichen”, Thuringia (Germany), made of various types of sandstones, travertine and Grenzdolomit. From a W-exposed, ... -
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). ... -
Monuments under threat: environmental impact, preservation strategies and natural stone recourses
(Environmental Earth Sciences, 2011) -
Weathering behaviour and construction suitability of dimension stones from the Drei Gleichen area (Thuringia, Germany)
(Environmental Earth Sciences, 2011)The construction suitability of a dimension stone depends on its weathering properties along with the petrology and the petrophysical properties. The aim of this study was to evaluate the suitability of the dimension stones ... -
Comments on: “Decontamination of solutions containing EDTA using metallic iron”
(Journal of Hazardous Materials, 2008)This letter presents an improved discussion of the data provided in a recent article on EDTA removal from aqueous solutions using elemental iron (Fe(0)) by O. Gyliene and his co-workers. It is shown that the authors have ... -
Simulation of saturated and unsaturated flow in karst systems at catchment scale using a double continuum approach
(Hydrology and Earth System Sciences, 2012-10-30)The objective of this work is the simulation of saturated and unsaturated flow in a karstified aquifer using a double continuum approach. The HydroGeoSphere code ( Therrien et al. , 2006 ) is employed to simulate spring ... -
Nanoscale Metallic Iron for Environmental Remediation: Prospects and Limitations
(Water, Air, & Soil Pollution, 2011) -
Modeling Net Ecosystem Exchange for Grassland in Central Kazakhstan by Combining Remote Sensing and Field Data
(Remote Sensing, 2009)Carbon sequestration was estimated in a semi-arid grassland region in Central Kazakhstan using an approach that integrates remote sensing, field measurements and meteorological data. Carbon fluxes for each pixel of 1 × ... -
Influence of aquifer heterogeneity on karst hydraulics and catchment delineation employing distributive modeling approaches
(Hydrology and Earth System Sciences, 2013)Due to their heterogeneous nature, karst aquifers pose a major challenge for hydrogeological investigations. Important procedures like the delineation of catchment areas for springs are hindered by the unknown locations ... -
Petrology, Geochemistry, and Geodynamic Implications of Basaltic Dyke Swarms from the Southern Continental Part of the Cameroon Volcanic Line, Central Africa
(The Open Geology Journal, 2012)Basaltic dyke swarms in the southern continental part of the Cameroon Volcanic Line (Bangangte, Dschang, Manjo areas) are tholeiitic in composition with 46 to 50 wt.% SiO 2 and have moderate Mg-numbers (53–59), ... -
Molecular Phylogeny of the Leafy Liverwort Lejeunea (Porellales): Evidence for a Neotropical Origin, Uneven Distribution of Sexual Systems and Insufficient Taxonomy
(PLoS ONE, 2013-12-18)Background: Lejeunea is a largely epiphytic, subcosmopolitan liverwort genus with a complex taxonomic history. Species circumscriptions and their relationships are subject to controversy; biogeographic history and ... -
Highly isotopically depleted isoprenoids ; molecular markers for ancient methane venting
(Geochimica et cosmochimica acta, 1999)We propose that organic compounds found in a Miocene limestone from Marmorito (Northem Italy) are source markers for organic matter present in aneient methane vent systems (cold seeps). The limestone contains high ... -
Effects of mixing granular iron with sand on the efficiency of methylene blue discoloration
(Chemical Engineering Journal, 2012)The influence of granular sand on the efficiency of metallic iron (Fe0) for the discoloration of a methylene blue (MB) solution was investigated in the current work. The initial MB concentration was 10 mg L-1 and mass ... -
Elemental iron (Fe0) for better drinking water in rural areas of developing countries
(Uranium, Mining and Hydrogeology, 2008)Many of the reasons behind the anthropogenic contamination problems in rural environments of developing countries lie in changes in the traditional way of life and the ignorance on the toxic potential of introduced ... -
Effects of the Presence of Pyrite and Carbonate Minerals on the Kinetics of the Uranium Release from a Natural Rock
(Journal of Radioanalytical and Nuclear Chemistry, 2006)The influence of calcite, dolomite, pyrite and vaterite on the kinetics of uranium (U) release from a natural rock under relevant i.e. field conditions has been investigated. The time dependence of the U release has been ... -
Bowing of dimensional granitic stones
(Environmental Earth Sciences, 2010)Bowing is a well-known phenomenon seen in marbles used as building veneers. This form of rock weathering occurs as a result of external factors such as temperature, humidity, the system for anchoring the marble slabs or ...