Field Volcanology: A Tribute to the Distinguished Career of Don Swanson
CONTAINS OPEN ACCESS

The interplay among clast size, vesicularity, postfragmentation expansion, and clast breakage: An example from the 1.8 ka Taupo eruption
-
Published:February 07, 2019
-
CiteCitation
S.J. Mitchell, S. Biass, B.F. Houghton*, A. Anderson, E. Bonny, B.H. Walker, B.G. Mintz, N.R. Turner, D. Frank, R.J. Carey, M.D. Rosenberg, 2019. "The interplay among clast size, vesicularity, postfragmentation expansion, and clast breakage: An example from the 1.8 ka Taupo eruption", Field Volcanology: A Tribute to the Distinguished Career of Don Swanson, Michael P. Poland, Michael O. Garcia, Victor E. Camp, Anita Grunder
Download citation file:
- Share
-
Tools
ABSTRACT
Field studies of tephra-fall deposits traditionally use the density of juvenile pyroclasts to determine vesicularity of the host magma at the point of fragmentation. A range of pyroclast sizes between 16 and 32 mm has commonly been chosen for this purpose. Larger pyroclasts outside this range may undergo postfragmentation vesiculation due to slow cooling of the interior of the clasts, while smaller pyroclasts may be too small to represent accurately the distribution of the largest vesicles. The assumption of this method, of course, is that the 16–32 mm size range is representative of the fragmented magma. We explore, in...