Block and ash flow

A block and ash flow is a flow of a mixture of volcanic ash and large (>26 cm) angular blocks.^[1] It commonly is formed as result of pyroclastic flow during a volcanic eruption. Collapse of lava domes are known to result in block and ash flow.^[2]

References

^ "Glossary - Block and ash flow". volcanoes.usgs.gov. United States Geological Survey. Retrieved 22 October 2018. Flow of ash and angular rock fragments larger than 26 cm or 10 in.
^ Ui, Tahide; Matsuwo, Norimichi; Sumita, Marit4= (1999). "Generation of block and ash flows during the 1990–1995 eruption of Unzen Volcano, Japan". Journal of Volcanology and Geothermal Research. 89 (1–4): 123–137. doi:10.1016/S0377-0273(98)00128-0. Retrieved 22 October, 2018. {{cite journal}}: |first4= missing |last4= (help); Check date values in: |access-date= (help)CS1 maint: numeric names: authors list (link)

[1] "Glossary - Block and ash flow". volcanoes.usgs.gov. United States Geological Survey. Retrieved 22 October 2018. Flow of ash and angular rock fragments larger than 26 cm or 10 in.

[2] Ui, Tahide; Matsuwo, Norimichi; Sumita, Marit4= (1999). "Generation of block and ash flows during the 1990–1995 eruption of Unzen Volcano, Japan". Journal of Volcanology and Geothermal Research. 89 (1–4): 123–137. doi:10.1016/S0377-0273(98)00128-0. Retrieved 22 October, 2018. {{cite journal}}: |first4= missing |last4= (help); Check date values in: |access-date= (help)CS1 maint: numeric names: authors list (link)

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