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629 results for “Clay”
Neutron activation analysis data of pottery, clay, and sand from Butarincon, Puren-Lumaco, Huitranlebu, and Maicoya, Chile and Huaca Prieta, Peru
<p>Neutron activation analysis data of pottery, clay, and sand from Butarincon, Puren-Lumaco, Huitranlebu, and Maicoya, Araucanína Region, Chile, and Huaca Prieta, La Libertad Department, Peru.</p>
Neutron activation analysis data of pottery and clays from Quillagua, Guatacondo, and other sites in Chile and Argentina
<p>Neutron activation analysis data of pottery and clays from La Poroma, Punta Gualaguala, Hornitos, Michilla, Quillagua, Costa Sur, Desembocadura Loa, Chiu-Chiu, and Calama, Antofagasta Region, Caleta Huelén and Guatacondo, Tarapacá Region, Chile, and Puna, Jujuy Province, Argentina.</p>
FIGURE 1 in Riparian and valley-margin hardwood species of pre-colonial Piedmont forests: A preliminary study of subfossil leaves from White Clay Creek, southeastern Pennsylvania, USA
FIGURE 1. Location of the White Clay Creek leaf mat site, Chester County, Pennsylvania.
Neutron activation analysis data of pottery and clays from multiple sites in Argentina, Chile, and Bolivia
<p>Neutron activation analysis data of pottery and clays from Potrero-Chaquiago, Agua Verde, Ingenio del Arenal Medanos, Santa Ana Abajo, Corral Blanco, Catamarca Province, Mancapa, Oloma Bajada, and Quimili Paso, Santiago del Estero Province, La Quiaca Vieja, Pena Blanca, and Yavi Chico, Jujuy Province, Potrero de Payogasta, Cortaderas, and Valdes, Salta Province, Argentina; Koati and Sun Islands, La Paz Department, Bolivia; and Caquena Este, Huaiharani, and Cachicoca, Arica and Parinacota Region, Chile.</p>
Clay_1_model
<p>Clay process dalamvelas_ants model</p>
Observed data, predictions and uncertainty associated with the updated distribution of clay minerals in the World Ocean
<p>Sparase observed data for various clay mineral species are .csv file format.</p> <p>Predictions and uncertainty for four seafloor clay mineral species (relative percentages, Kaolinite, Illite, Smectite, Chlorite) are generated via geospatial machine learning (GML). Methodology is outlined in "The updated distribution of clay mineral in the World Ocean"<span>. These files are in net-CDF file format. Files are cell-centered. Further, latitudes and longitudes of grid cells are denoted in the variables of the .nc files.</span></p>
Neutron activation analysis data of pottery, clay, obsidian, and andesite from multiple sites in Argentina
<p>Neutron activation analysis data of pottery, clay, obsidian, and andesite from multiple sites in Argentina and Chile</p> <p> </p>
Raw data for the submitted manuscript: The Effect of Clay Type on the Toxicity of Carbendazim and Imidacloprid to the Earthworm Eisenia andrei in Artificial Soils
<p>Raw data obtained from toxicity tests with the earthworm <em>Eisenia </em><em>andrei </em>exposed for 56 days to carbendazim and imidacloprid in artificial soils created with kaolin and bentonite clay. Tests were performed following OECD guideline 222. The file includes data on earthworm starting and ending weights, survival, and reproduction.</p>
Clay tutorial images #3
<p>Clay tutorial images</p>
Raw data for the publication entitled -"Local disorder in calcined kaolinitic clays for pozzolanic early-age reactivity understanding: A Synchrotron Pair Distribution Function study-"
<p>Raw data for the publication entitled -"Local disorder in calcined kaolinitic clays for pozzolanic early-age reactivity understanding: A Synchrotron Pair Distribution Function study-". This includes: raw data for calorimetry, SXRPD,LXRPD,NMR and PSD.</p>
Data from: Crypsis in the pelagic realm: evidence from exceptionally preserved fossil fish larvae from the Eocene Stolleklint Clay of Denmark
<p>Marine deposits of earliest Eocene age in northern Jutland, Denmark, are renowned for yielding diverse teleost assemblages that have proved central for enhancing our understanding of the early evolution of many extant actinopterygian clades. In this study, we investigate diminutive larval fish fossils from the Stolleklint Clay<b>,</b> Ølst Formation, that retain multiple soft-tissue features preserved as distinct dark-coloured stains. In order to examine the elemental and molecular composition of these soft parts, we employed a combination of time-of-flight secondary ion mass spectrometry (ToF-SIMS), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). Our analyses revealed that the preserved structures contain chemically identifiable eumelanin intimately associated with densely aggregated microbodies that are morphologically consistent with melanosome organelles. Thus, we conclude that the carbonaceous structures represent traces of originally melanized body parts, including the eyes and peritoneum. Comparable pigmentation patterns are seen in many extant teleost larvae that use semi-transparency as a means of camouflage in pelagic environments, to suggest a similar visual appearance of the Stolleklint Clay fish fossils. This in turn suggests that adaptations for concealment and UV-protection had evolved already by the beginning of the Eocene, notably during a time interval characterized by an extreme greenhouse climate, when the global fish fauna become increasingly modern in composition.</p>
Clay minerals control rare earth elements (REE) fractionation in Brazilian mangrove soils
<p>XRD data from different size fractions of Brazilian mangrove soils, supporting the manuscript entitled <strong><em>Clay minerals control rare earth elements (REE) fractionation in Brazilian mangrove soils, </em></strong>submitted to the journal <strong><em>Catena</em>.</strong></p>
GEOLAB Transnational Access project RELERT - Risk and reliability study in quick clay
<p>Quick clay is characterised by complete collapse and liquid-like mobility when overloaded. Quick clay is found primarily in Norway and Sweden, but also exists in Finland, Russia, Canada and Alaska. Quick clay landslides, with their retrogression characteristics and extreme mobility, pose significant risk to human lives, infrastructure, property and surrounding ecosystems. Hence, the proper characterization of quick clay sites is essential for ensuring the safety and resilience of infrastructure in Norway and elsewhere in Europe.</p> <p>The current practice for mapping quick clay in Norway relies heavily on borehole data with either rotary sounding or total sounding and core samples tested in the laboratory. The only method for identifying quick clay with certainty is physical testing in the laboratory, but it is time-consuming, expensive and gives limited information, i.e., only at the depths and locations where the sample is taken. In Norway, rotary sounding and total soundings are frequently used in mapping of quick clay. In addition, geophysical methods such as Electrical Resistivity Tomography (ERT) are also occasionally used to supplement the results from soundings, particularly in early stage of ground investigation. Rotary sounding is regarded as the most cost-effective method for detecting potentially quick clay pockets.</p> <p>The accuracy of quick clay mapping by a certain ground investigation method increases with increasing number of boreholes and decreasing distances to the boreholes in the area of interest. The accuracy is also increased with additional data sources such as ERT and/or other geophysical methods. Each rotary sounding, for example, provides information on the potential occurrence of quick clay with high accuracy at its location, but the accuracy decreases with increasing distance from the actual location of the rotary sounding. Current practice of mapping quick clay rarely deals with uncertainties associated with ground investigations quantitatively. The uncertainties arise due to various sources including the interpretation of the rotary sounding, the number of soundings and the distance from the soundings, the equipment itself and the testing procedure. Dealing with uncertainty currently relies heavily on engineering judgement, which is subjective.</p> <p>Transnational Access project RELERT is funded through the 1<sup>st</sup> call for proposal for the GEOLAB project. This project aims at developing models and validated on results from field testing to deal with uncertainty in ground characterisation in quick clay area more quantitatively.</p> <p>The objectives of the RELERT project are:</p> <p>(i) to obtain and process ground investigation data profiles at the Tiller-Flotten quick clay site (i.e. rotary soundings and ERT (electrical resistivity tomography) profiles. Notes: some of the data reported is obtained in earlier field investigation campaign but are processed and reported in this projects.</p> <p>(ii) to build a mathematical model that characterizes the spatial variability of quick clays in Norway and</p> <p>(iii) to develop a methodology for reliability assessment of quick clay sites under retrogressive failure.</p> <p>We employ rotary soundings, soil samples and will use ERT-results in further study to learn the parameters of a hierarchical random field model, recently proposed by the user group for modelling the inherent spatial variability of material properties. The parameters of the model is learned by application of Bayesian analysis on the ground investigation data.</p> <p>In further studies, we plan to use the model in slope reliability assessments under retrogressive slope failure through application of Monte Carlo methods. The results of the study are and will be documented in joint publications of the host and user groups.</p>
Viscoelasticity modeling of clay minerals by dynamic viscoelasticity measurement and its implications for earthquake faulting
<p>We conducted dynamic viscoelastic measurements on three clay minerals, kaolinite, illite and smectite with water. These concentrated (dense) suspension systems of clay minerals were investigated using a high-temperature and high-fluid-pressure rheometer to determine their viscoelastic properties, which help further the understanding of tectonic and non-tectonic phenomena in the shallow unconsolidated portion of the lithosphere. Our results suggested that the rheological properties resulting from the network structure of the clay mineral were temperature, pressure and peak shear strain rate dependent. In addition, it was observed during this study that the amount of change in the phase angle varied systematically with the type of clay mineral. This suggests that the viscoelastic behaviour of unconsolidated systems saturated with fluid varies with the type of clay minerals that compose it. (Abstract)</p>
Supplementary material/Organic carbon dynamics in clay soils: impact of management practices on microorganism structure and abundance under semi-arid conditions
<p>Proper management of soil organic matter in arid and semi-arid regions improves organic carbon storage in the soil, helps in compact soil degradation, and mitigates climate change impacts, and preserves ecosystem functionality and sustainability food security. This study aims to provide a better insight into the biogeochemical processes that drive the organic carbon dynamics of saline clay soil in a semi-arid climate. The study is not intended to be exhaustive but contributes to analyzing the relationship between bacterial microflora, physicochemical properties, and organic carbon dynamics as a function of different soil management modes. The monitoring was carried out on three different plots located at the National Institute of Agronomic Research of Algeria. A physicochemical characterization of the soils was performed. A metagenomic study was also conducted to identify bacterial biodiversity using PCR-amplified DNA sequencing. The study results show that the control plot has the highest average organic carbon stock value at 47 Mg ha<sup>-1</sup>. This was followed by the amended plot and the conventional plot, respectively, with 43 Mg ha<sup>-1</sup> and 38 Mg ha<sup>-1</sup>. In the context of this study, organic carbon dynamics would appear to depend on the interaction of several biotic and abiotic factors. Soil management methods would impact the density and diversity of bacterial microflora. This, in turn, affects the soil's physicochemical properties and, more specifically, organic carbon dynamics and storage.</p>
Dataset of experiment measurements of plastic particle settling induced by clay. and surfactants
<p>Dataset giving experiment input parameters (clay type, surfactant, densities, added mass, etc), measured mass of particles at the surface and bottom, and calculated percent of total mass recovered with breakdown into percent of input plastic mass associated with floating and settled partlcles.</p>
Data for high-clay content submarine slope failure flume experiments. Experiment 25% clay, static 1, part 3.
<p>These video and photographic data support the following manuscripts:</p><p>Silver, M.M.W., Dugan, B., 2020, The influence of clay content on submarine slope failure: insights from laboratory experiments and numerical models, Geological Society of London, Special Publications, 500, 301-309, <a href="https://doi.org/10.1144/SP500-2019-186">https://doi.org/10.1144/SP500-2019-186</a>. </p><p>Silver, M.M.W., Dugan, B., 2023, Cohesion, permeability, and slope failure dynamics: implications for failure morphology and tsunamigenesis from benchtop flume experiments, Marine Geology, 462, <a href="https://doi.org/10.1016/j.margeo.2023.107079">https://doi.org/10.1016/j.margeo.2023.107079</a>.</p><p>Log sheets are included for each experiment file.</p>
Data for high-clay content submarine slope failure flume experiments. Experiment 25% clay, static 2, part 1.
<p>These video and photographic data support the following manuscripts:</p><p>Silver, M.M.W., Dugan, B., 2020, The influence of clay content on submarine slope failure: insights from laboratory experiments and numerical models, Geological Society of London, Special Publications, 500, 301-309, <a href="https://doi.org/10.1144/SP500-2019-186">https://doi.org/10.1144/SP500-2019-186</a>. </p><p>Silver, M.M.W., Dugan, B., 2023, Cohesion, permeability, and slope failure dynamics: implications for failure morphology and tsunamigenesis from benchtop flume experiments, Marine Geology, 462, <a href="https://doi.org/10.1016/j.margeo.2023.107079">https://doi.org/10.1016/j.margeo.2023.107079</a>.</p><p>Log sheets are included for each experiment file.</p>
Clay mineralogy of debris from the basal ice of the Byrd ice core, central West Antarctica
<p>This dataset contains the clay mineral assemblage of debris melted from three intervals of basal ice from the Byrd ice core. Analyses were conducted on the <2 micron fraction. The ice core the debris was extracted from was drilled at 80<i><strong>°</strong></i> 0.1'S, 119<i><strong>°</strong></i> 31.0'W at Byrd Station, West Antarctica, in January 1968.</p>
Data for high-clay content submarine slope failure flume experiments. Experiment 25% clay, static 2, part 2.
<p>These video and photographic data support the following manuscripts:</p><p>Silver, M.M.W., Dugan, B., 2020, The influence of clay content on submarine slope failure: insights from laboratory experiments and numerical models, Geological Society of London, Special Publications, 500, 301-309, <a href="https://doi.org/10.1144/SP500-2019-186">https://doi.org/10.1144/SP500-2019-186</a>. </p><p>Silver, M.M.W., Dugan, B., 2023, Cohesion, permeability, and slope failure dynamics: implications for failure morphology and tsunamigenesis from benchtop flume experiments, Marine Geology, 462, <a href="https://doi.org/10.1016/j.margeo.2023.107079">https://doi.org/10.1016/j.margeo.2023.107079</a>.</p><p>Log sheets are included for each experiment file.</p>
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