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  1. Simplifying assumptions in volcano modeling: are we missing something crucial?

    14 Mar 2014 | Contributor(s): Chiara Paola Montagna, Antonella Longo, Paolo Papale, Gilberto Saccorotti

    Volcanoes are extremely complex natural systems, in which the interplay of different forces and physical processes determines a variety of behaviors that can be hard to interpret. The deep magmatic systems cannot be directly observed, and we must rely on indirect information. The latter typically...

  2. Simulación de Flujos de Lava en el complejo volcanico del Cumbal (Colombia) usando LavaPL

    04 Dec 2013 | Contributor(s): Carlos José Muñoz Montoya, Ricardo Arturo Mendez Fajury, Paola Andrea Narvaez

  3. Simulation outputs Montserrat

    14 Mar 2012 | Contributor(s): Abani Patra

  4. Size of volcanic ash

    08 Feb 2011 | Contributor(s): William I Rose

    Size of ash particles is discussed--ash, lapilli, fine and very fine ash, phi sizes, lognormal distributions and bimodal ones. Patterns of fallout and grain size distributions.

  5. Size-distribution of scoria cones within the Eğrikuyu Monogenetic Field (Central Anatolia, Turkey)

    26 May 2018 | Contributor(s): Göksu USLULAR, Gonca Kuşcu, Arda Arcasoy

    Eğrikuyu Monogenetic Field (EMF) is one of the five clusters of monogenetic volcanoes in Quaternary Central Anatolian Volcanic Province (CAVP). EMF consists mainly of scoria cones and a few maars (e.g. Kutören, Obruk). Previous studies on monogenetic volcanoes of CAVP mainly focused on...

  6. SlopeCalc

    30 Jun 2011 | Contributor(s): Georg Florian Zellmer

    This executable takes a .txt file as input (see "example-Sr.txt"), and returns a .txt file as output (see "Slope-example-Sr.txt").The input file consists of distance, value, and uncertainty columns. The output file consistes of distance, slope, uncertainty of slope, intercept, and uncertainty of...

  7. Smithsonian's Global Volcanism Program Database

    25 Mar 2011 | Contributor(s): Paul Kimberly

    For more than three decades the Smithsonian's Global Volcanism Program (GVP) has compiled descriptions of both ongoing and past volcanism around the world in order to better understand the full range of Earth's eruptive activity, building its database the Volcano Reference File (VRF). To make...

  8. SNGPlag

    07 May 2019 | Contributor(s): Benjamin James Andrews

    SNGPlag. Supersaturation Nucleation and Growth of Plagioclase: a forward model of plagioclase nucleation and growth in decompressing magma. This tool models how plagioclase crystallization in a decompressing magma (of user specified composition) during a specified decompression path. User...

  9. Solubility of sulfur in basaltic melts

    26 Apr 2013 | Contributor(s): Marina Aletti, Michel Pichavant

    VUELCO Conference, 2013, Barcelona (Spain)Sulfur is the third most abundant volatile element in magmatic melts, after H2O and CO2. Involved as a chief actor in many igneous processes, from the volcanic degassing to the formation of ore deposits, and due to the strong dependence between speciation...

  10. South Mono Geochemical Dataset

    18 Jan 2014 | Contributor(s): Marcus I Bursik

    This is the set of geochemical data that are shown in the publication on the South Mono tephra (in review at JVGR as of 18 January 2014).

  11. Specchio di Venere alkaline lake (Sicily, Italy): geochemical investigations based on gas and water compositions

    18 Sep 2013 | Contributor(s): Giovannella Pecoraino, S. Bellomo, W. D’Alessandro, L. Brusca, M. Longo

    The word “volcanic lake” is instinctively linked to a hot and acidic water body although alkaline lakes being not too rare. The abundant geogenic CO2 also contributes to weathering reactions within cold or thermal aquifers that release alkali and bicarbonate to groundwater. Such waters emerging...

  12. Spherulites and thundereggs from pitchstones of the Deccan Traps: geology, petrochemistry, and emplacement environments

    18 Sep 2013 | Contributor(s): Pooja Vinod Kshirsagar

    Spherulites and thundereggs are rounded, typically spherical, polycrystalline objects found in glassy silicic rocks. Spherulites are dominantly made up of radiating microscopic fibers of alkali feldspar and a silica mineral (commonly quartz). They form due to heterogeneous nucleation in highly...

  13. Spread sheet to calculate tephra volume for exponential thinning

    03 Dec 2014 | Contributor(s): Manuel Nathenson, Judy Fierstein

    An Excel spread sheet and instructions are provided to calculate tephra volume for exponential thinning on a log(thickness) versus square root of area plot. The spread sheet calculates volumes for a single straight line and for two straight lines. The equations for the calculations are from...

  14. StereoP

    27 Jun 2017 | *Tools | Contributor(s): Joaquin Alberto Cortes

    StereoP is a tool to plot equal angle Stereonets

  15. Strike converter 1.0 for ImageJ

    24 Jun 2019 | Offline Tools | Contributor(s): Joaquin Alberto Cortes

    The resource is a plugin for ImageJ or Fiji that converts line orientations measured by the programme in the usual mathematical convention (i.e. horizontal is zero degrees and vertical is 90, clockwise is a negative value), into the standard geological way (i.e North-South orientation is zero...

  16. Strike converter 1.0 for ImageJ

    24 Jun 2019 | Offline Tools | Contributor(s): Joaquin Alberto Cortes

    The resource is a plugin for ImageJ or Fiji that converts line orientations measured by the programme in the usual mathematical convention (i.e. horizontal is zero degrees and vertical is 90, clockwise is a negative value), into the standard geological way (i.e North-South orientation is zero...

  17. Stromboli online

    29 Jun 2011 | Educational Materials | Contributor(s): Roberto Carniel

    Stromboli online - Volcanoes of the World http://stromboli.net The primary goal of Stromboli online website is to enrich and stimulate the teaching of Earth Sciences by presenting images, movies, data, virtual field trips and other educational material in relation to volcanoes.Although there is...

  18. Structural architecture and the episodic evolution of the ediacaran Campo Alegre Basin (southern Brazil): Implications for the development of a synorogenic foreland rift and a post-collisional caldera volcano

    09 Apr 2021 | Publications | Contributor(s): Lucas Martins Lino, Francy Roxana Quiroz-Valle, Vinicius Abud louro, Miguel Ângelo Stipp Basei, Silvio Roberto Farias Vlach, Mathias Hueck, Patricio Rodrigo Montecinos Munõz, Sérgio Brandolise Citroni

    During the last decades, tectonic models provided new insight into the evolution of the Luis Alves, Curitiba, and Paranaguá terranes, which are all limited by thrust and transpressive shear zones, nowadays outcropping only as deep crustal horizons and presenting poorly known lateral...

  19. STRUCTURAL CONTROLS OF MONOGENETIC VOLCANISM

    04 Sep 2013 | Presentations | Contributor(s): Adelina Geyer Traver

    The factors controlling the precursory activity in monogenetic volcanic fields are still poorly understood, which means that eruption forecasts in these systems are not very accurate. The fact that in monogenetic volcanism each eruption has a different vent suggests that volcanic susceptibility...

  20. STRUCTURAL CONTROLS ON MONOGENETIC VOLCANISM: THE GARROTXA VOLCANIC FIELD CASE STUDY

    04 Sep 2013 | Presentations | Contributor(s): Xavier Bolos, Stephanie Barde-Cabusson, Jo Gottsmann, Joan Marti, Dario Pedrazzi, Llorenç Planaguma, Antonio Camacho, Adelina Geyer Traver, Erika Ronchin

    The factors controlling the precursory activity in monogenetic volcanic fields are still poorly understood, which makes that eruption forecasts in these systems is not very accurate. The fact that in monogenetic volcanism each eruption has a different vent suggests that volcanic susceptibility...