Accurate measurements of volcanic ash morphology are critical to improving both our
understanding of fragmentation processes and our ability to predict particle behaviour. In …

The morphometry of volcanic ash produced by explosive eruptions yields ample information
on fragmentation processes (eg magmatic vs magma–water interactions), and on transport …

To quantify the size of tephra, two practical challenges must be addressed: the wide range of
particle sizes (10− 8-10 1 m) and the diversity of particle shape, density and optical …

Analyses of volcanic ash are typically performed either by qualitatively classifying ash
particles by eye or by quantitatively parameterizing its shape and texture. While complex …

Juvenile pyroclasts, especially in the ash size range, provide important information on
primary fragmentation processes, ie, initial explosive magma fragmentation, and on the state …

Crystal-rich intermediate magmas are subjected to both primary and secondary
fragmentation processes, each of which may produce texturally distinct tephra. Of particular …

Correlation of distal ash deposits with their proximal counterparts mainly relies on chemical
and mineralogical characterization of bulk rock and matrix glasses. However, the study of …

The recent Eyjafjallajökull (Iceland) eruption strikingly underlined the vulnerability of a
globalized society to the atmospheric dispersal of volcanic clouds from even moderate-size …

Volcanic ash emissions impact atmospheric processes, depositional ecosystems, human
health, and global climate. These effects are sensitive to the size and composition of the ash; …

Tephra deposits result from explosive volcanic eruption and serve as indirect probes into
fragmentation processes operating in subsurface volcanic conduits. Primary magmatic …