Search results for "basalt"

showing 3 items of 223 documents

Allium aetnense (Amaryllidaceae), a new species from Sicily.

2013

A new species from Mt Etna (Sicily), Allium aetenense of A. sect. Codonoprasum, is described and illustrated. It is a diploid species (2n = 16) that grows on basaltic rocks in the mountain belt and shows close relationships with A. tenuiflorum of the Italian peninsula. Its morphology, karyology, leaf anatomy, seed coat microsculpturing, ecology and taxonomic position are examined.

geographyCoatgeography.geographical_feature_categoryseed microsculpturingSettore BIO/02 - Botanica SistematicaMorphology (biology)Plant ScienceAmaryllidaceaeBiologybiology.organism_classificationAllium karyology morphology section Codonoprasum seed microsculpturing SicilyAlliumkaryologyCodonoprasumPeninsulaBotanymorphologyAlliumAllium; karyology; morphology; Codonoprasum; seed microsculpturing; SicilySicilyEcology Evolution Behavior and SystematicsBasaltic rock
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Understanding the SO 2 degassing budget of Mt Etna’s paroxysms: First clues from the december 2015 sequence

2019

The persistent open-vent activity of basaltic volcanoes is periodically interrupted by spectacular but hazardous paroxysmal explosions. The rapid transition from quiescence to explosive eruption poses a significant challenge for volcanic hazard assessment and mitigation, and improving our understanding of the processes that trigger these paroxysmal events is critical. Although magmatic gas is unquestionably the driver, direct measurements of a paroxysm’s gas flux budget have remained challenging, to date. A particularly violent paroxysmal sequence took place on Etna on December 2015, intermittently involving all summit craters, especially the Voragine (VOR) that had previously displayed no…

010504 meteorology & atmospheric sciences2Earth and Planetary Sciences(all)UV camera010502 geochemistry & geophysics01 natural sciencesSequence (geology)Basaltic paroxysmsImpact craterBasaltic paroxysms; Etna; OMI; Thermal remote sensing; UV camera; Volcanic SO ; 2High spatial resolutionlcsh:ScienceThermal remote sensing0105 earth and related environmental sciences/dk/atira/pure/subjectarea/asjc/1900BasaltVolcanic SOgeographygeography.geographical_feature_categoryOMIGas fluxBasaltic paroxysmEtna volcanoVolcanoMagmavolcanic SO2General Earth and Planetary SciencesEtnalcsh:QSeismologyGeology
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Asphalt mixtures modified with basalt fibres for surface courses

2018

Abstract This paper shows the results of an experimental study concerning the effect of introduction of basalt fibres in asphalt mixtures for surface course, mainly with regard to those to be used in urban areas, for dedicated bus lanes. Surface layers, where tire-pavement interactions occur, have to provide different properties such as high friction (very important for users’ safety), stability, resistance to meteorological agents, and contribution to the overall pavement performances. Considering that basalt fibres provide considerable physical and mechanical properties and above all high abrasion resistance, scope of the study is to evaluate the effects of these fibres on mixtures proper…

BasaltMaterials scienceRut0211 other engineering and technologiesModulus02 engineering and technologySurface finishBuilding and ConstructionRutting resistance021001 nanoscience & nanotechnologyFlatteningAsphalt mixtureAsphalt021105 building & constructionSettore ICAR/04 - Strade Ferrovie Ed AeroportiGeneral Materials ScienceTexture (crystalline)Materials Science (all)Composite materialDeformation (engineering)0210 nano-technologySurface textureBasalt fibreCivil and Structural Engineering
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