Skip to main content
Article
Dispersal of ash in the great Toba eruption, 75 ka
Geology
  • William I. Rose, Michigan Technological University
  • C. A. Chesner, Michigan Technological University
Document Type
Article
Publication Date
10-1-1987
Abstract
One of Earth's largest known eruptions, the Toba eruption of 75 ka, erupted a minimum of 2800 km3 of magma, of which at least 800 km3 was deposited as ash fall. This ash may be entirely of coignimbrite origin and dispersed widely because of high drag coefficients on the predominantly bubble-wall shards. Shards of this shape are broken from the walls of spherical vesicles, which formed in high abundance in isotropic strain shadows near phenocrysts in this crystal-rich magma.
Publisher's Statement

© 1987 Geological Society of America. Publisher's version of record: https://doi.org/10.1130/0091-7613(1987)15%3C913:DOAITG%3E2.0.CO;2

Citation Information
William I. Rose and C. A. Chesner. "Dispersal of ash in the great Toba eruption, 75 ka" Geology Vol. 15 (1987) p. 913 - 917
Available at: http://works.bepress.com/william-rose/47/