title: Volcanic dust in deep-sea sediments: relationship of microfeatures to explosivity estimates.
abstract: Particle size variations in a series of volcanic ash layers, deposited in high latitudes of the South Pacific during the past 2.5 million years, were earlier analyzed by using a model in which source cloud height and minimum volcanic paleoexplosivity are derived from downwind ash distribution. Examination of submicrometer morphological features of the volcanic glass shards reveals a clear relationship between what appear to be impact features on the glass surfaces and the independently derived paleoexplosivities, which suggests that this may be a simple means to characterize ash horizons and estimate relative volcanic explosivities.
authors.forename: T C
authors.initials: TC
authors.lastname: Huang
authors.forename: N D
authors.initials: ND
authors.lastname: Watkins