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Trace Element Composition of the Mount St. Helens Plume: Stratospheric Samples from the 18 May Eruption

Teri Vossler, David L. Anderson, Namik K. Aras, Janet M. Phelan and William H. Zoller
Science
New Series, Vol. 211, No. 4484 (Feb. 20, 1981), pp. 827-830
Stable URL: http://www.jstor.org/stable/1686030
Page Count: 4
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Trace Element Composition of the Mount St. Helens Plume: Stratospheric Samples from the 18 May Eruption
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Abstract

Atmospheric particulate material collected from the stratosphere in the plume of the 18 May 1980 eruption of the Mount St. Helens volcano was quite similar in composition to that of ash that fell to the ground in western Washington. However, there were small but significant differences in concentrations of some elements with altitude, indicating that the stratospheric material was primarily produced from fresh magma, not fragments of the mountain.

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