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Pre-1980 tephra-fall deposits erupted from Mount St. Helens, Washington

Professional Paper 1563

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Abstract

More than 100 tephra-fall deposits erupted from Mount St. Helens within about the last 40,000 years are grouped into tephra sets and layers distinguished from each other chiefly by differences in mineral composition and age. The tephra deposits record a complex history of the volcano, form important time-stratigraphic markers, and provide information about probable kinds, frequencies, and magnitudes of future eruptions.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Pre-1980 tephra-fall deposits erupted from Mount St. Helens, Washington
Series title:
Professional Paper
Series number:
1563
Edition:
-
Year Published:
1996
Language:
ENGLISH
Description:
99 p.