Partitioning of Tephra in Submarine Eruption Columns
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Particles of similar size and shape, but different bulk densities               fall through a fluid with different terminal velocities.  While                 this applies to pyroclastic particles falling through air, the                  affect is accentuated in water, where lower terminal velocities                 tend to produce a higher degree of hydraulic organization in                    falling particles.  These relationships, plus experimental                      studies relating grain size, density and terminal velocity of                   volcanic particles, were used by Fiske and Cashman to formulate a               model that helps to explain many textural and stratigraphic                     relationships of deposits formed by fallout from submarine                      eruption columns.  This project will test the model through a                   detailed study of Mio-Pliocene submarine volcanic deposits now                  exposed in the Shirahama Formation, Izu Peninsula, Japan.  It                   will involve the collection of lithic fragments through single                  stratigraphic units, and shape analyses of these at either                      Princeton or Rutgers.  Collaborators are R. S. Fiske (Smithsonian               Institution) and I. Kushiro (U. of Tokyo)
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{'Code': '155700', 'Text': 'VOLCANOLOGY & MANTLE GEOCHEMIS'}
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