Block and ash flow
A block and ash flow or 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.
- ^ Tahide, Ui; Matsuwo, Norimichi; Sumita, Marit; Fujinawa, Akihiko (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 October 22, 2018.