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- W103201003 abstract "Our study on the shape of stratovolcanoes was based on the analysis of the radial elevation profiles of each volcano. The lower half section of the volcanoes is always well fitted by a logarithmic curve, while the upper half section is not, and falls into two groups: it is fitted either by a line (“C-type”, conical upper part) or by a parabolic arc (“P-type”, parabolic/concave upper part). Chemical composition of the two groups’ eruptive products indicates higher SiO2 and/or higher H2O content for C-type volcanoes, which could imply a higher incidence of mildly explosive (e.g. strombolian) eruptions. We propose that this higher explosivity is responsible for forming the constant uppermost slopes by the deposition of ballistic tephra and its subsequent stabilisation at a constant angle. In contrast, P-type volcanoes are characterized by a smaller SiO2 and H2O content, which can be responsible for a higher incidence of effusive events and/or a lower incidence of upper flank-forming (i.e. mild) explosive eruptions. Therefore, the concave upper flanks of these volcanoes may be shaped prevailingly by lava flows. Based on this hypothesis, we propose that the advanced morphometric analysis of the elevation profile of stratovolcanoes can provide insights into their dominant eruptive style." @default.
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- W103201003 date "2010-05-01" @default.
- W103201003 modified "2023-10-04" @default.
- W103201003 title "Two types of the regular stratovolcano shape: a DEM-based morphometrical analysis" @default.
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