This sample is not sand, it is volcanic ash; however, a curatorial decision was made to include it in the Museum of Sand on-line collection. Mt. St. Helens is in the Cascade mountain chain that extends north-south through central Oregon and Washington states. Mt. St. Helens blew it's top in 1980, resulting in cataclysmic changes to the surrounding landscape, and the loss of some human lives. Large flows of ash entered streams and rivers on the west side of the mountain and altered the sediment regime of these streams and the Columbia River to which they are tributaries.
This sample was collected in 1980 soon after the eruption by the husband of one of our collectors. She generously donated this sample to the Museum of Sand.
Low magnification
Scale: distance between each line = 1 mm
High magnification
Scale: distance between each line = 1 mm
Satellite view of Mt. St. Helens
State of Washington, USA
Sample donated by:
Susan Lehner
collected in 1980
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