Sinking of volcanic ash in uncompacted sediment in williams lake, washington |
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Authors: | Anderson R Y Nuhfer E B Dean W E |
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Abstract: | Volcanic ash from the eruption of Mount St. Helens on 18 May 1980 fell into Williams Lake in eastern Washington and was temporarily suspended at the sediment-water interface. After several months of compaction, the ash layer broke up and sank into lower density uncompacted lake sediment. Stratigraphic time displacements of several hundred years and a failure to recognize discontinuous ash layers in sediment cores are possible consequences of this process. |
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