Articles | Volume 6, issue 2
https://doi.org/10.5194/se-6-553-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/se-6-553-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
21 May 2015
Research article |
| 21 May 2015
Syn-eruptive, soft-sediment deformation of deposits from dilute pyroclastic density current: triggers from granular shear, dynamic pore pressure, ballistic impacts and shock waves
G. A. Douillet
CORRESPONDING AUTHOR
Earth and Environmental Sciences, Ludwig-Maximilians-Universität, Munich, Germany
B. Taisne
Earth Observatory of Singapore, Nanyang Technological University, Singapore
È Tsang-Hin-Sun
Université of Brest and CNRS, Laboratoire Domaines Océaniques, Plouzaré, France
S. K. Müller
Meteorological Institute, Ludwig-Maximilians-Universität, Munich, Germany
U. Kueppers
Earth and Environmental Sciences, Ludwig-Maximilians-Universität, Munich, Germany
D. B. Dingwell
Earth and Environmental Sciences, Ludwig-Maximilians-Universität, Munich, Germany
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Short summary
Sedimentary beds can exhibit signs of local deformation in pyroclastic strata. Patterns are reviewed and trigger mechanisms interpreted.
During an eruption, basal granular flows can have a fluidized behavior, inducing over- or underpressure at the bed interface. Basal shear can overturn strata. Large blocks ejected ballistically deform the ground when landing. Explosions at the vent produce shock waves that can destabilize a bed. These syn-eruptive triggers are specific to explosive volcanism.
Sedimentary beds can exhibit signs of local deformation in pyroclastic strata. Patterns are...
