Mathematics – Logic
Scientific paper
Aug 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29p..40r&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 16, pp. 40-1, CiteID 1792, DOI 10.1029/2002GL014819
Mathematics
Logic
6
Volcanology: Eruption Mechanisms, Volcanology: General Or Miscellaneous
Scientific paper
Granular flows were generated by the release of beds of particles in various fluidized states, which then deaerated in a horizontal channel. We describe characteristics of the flows and their deposits. Morphological similarities between deposits in experiments and in the field suggest that pyroclastic flow deposits form from a fluidized mixture. The experiments show that slightly expanded, fluidized flows are more mobile than non-fluidized flows of equivalent volume and material composition. They travel to a fixed distance from their source, which depends only weakly on their initial degree of fluidization. Flows of fine particles (<100 μm) deaerate slowly and are highly mobile. Pyroclastic flows commonly have large amounts of fine ash, which may have a controlling influence on their high mobility.
Gilbertson M.
Phillips Charles J.
Roche O.
Sparks Stephen J. R.
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