In the course of explosive volcanic eruptions, fragments of magma and country rock are expelled into the atmosphere. Depending on the eruptive conditions, these clasts organize as tephra clouds or pyroclastic currents. The resulting plethora of depositional conditions are indirectly linked to the timing and dynamics of an eruption, yet these links cannot always be straightforwardly depicted.

This session encompasses the various aspects of sedimentation conditions related to explosive volcanism, including (but not limited to):
• Processes of ash dispersal in tephra clouds and their deposition under the effect of wind, rain or accretion. 
• Transport in and deposition from pyroclastic currents, from concentrated flows to very dilute pyroclastic density currents (PDCs) and co-PDC clouds. 
• Hazard assessment via the study of deposits
• Resuspension of volcanic ash and related impacts. 
• Generation of lahars in the light of primary deposit characteristics and meteorological conditions.
• Tephrachronology

This session aims at gathering contributions from field-based, theoretical, numerical
and analogue models as well as experimental approaches to unravel the secrets of volcaniclastic sediments and their significance.