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Publication Citation
| USGS Series | Professional Paper |
|---|---|
| Report Number | 1563 |
| Title | Pre-1980 tephra-fall deposits erupted from Mount St. Helens, Washington |
| Edition | - |
| Language | ENGLISH |
| Author(s) | Mullineaux, Donal R. |
| Year | 1996 |
| Originating office | |
| USGS Library Call Number | - |
| Physical description | 99 p. |
| ISBN |
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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.
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