Sinking of Volcanic Ash in Uncompacted Sediment in Williams Lake, Washington

Sinking of Volcanic Ash in Uncompacted Sediment in Williams Lake, Washington

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. Stratigraph...

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Veröffentlicht in:Science (American Association for the Advancement of Science) 1984-08, Vol.225 (4661), p.505-508
Hauptverfasser: Anderson, Roger Y., Nuhfer, Edward B., Dean, Walter E.
Format: Artikel
Sprache:eng
Schlagworte:
Ashes
Average linear density
Core samples
Geology
Lake sediment cores
Moisture content
Mud
Natural disasters
Resistance movements
Sediments
Tephra
Volcanic ash
Volcanic ash, tuff, etc
Volcanic rocks
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Zusammenfassung: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.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.225.4661.505