| Id | 173 |
| Identification Type | Lithofacies |
| Name | Tephra - Mt. St. Helens J |
| Distinguishing Features | |
| Description | Lithofacies defined as the directly deposited ejecta from the 'Series J' eruption of Mt. Saint Helens, Washinton state, ca. 12000(?) cal. yr BP.
Distinguished indisputably by elemental chemistry. Identification is frequently inferred by bracketing ages, geographic distribution, and general appearance. |
| Tags | volcanic-glass isotropic conchoidal vesicular Cascades |
| External Resources | |
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