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Filtering by: Subject Volcanic ash, tuff, etc. -- Northwest, Pacific

The effects of the Mazama tephra-falls : a geoarchaeological approach

Creator:

Matz, Stephan E.

Abstract:

About 7,000 years ago two major tephra-falls blanketed the Pacific Northwest in volcanic ash. These two tephra-falls, identified as the Llao and climatic tephra-falls, were a part of the eruptive events that led up to the collapse of Mount Mazama to form Crater Lake in the southern Oregon Cascades. The...

Resource Type:

Masters Thesis
Neutron activation analysis for correlating volcanic ash soils

Creator:

Borchardt, Glenn Arnold

Resource Type:

Dissertation
Mt. St. Helens ash : considerations of its fallout on rangelands

Creator:

Sneva, Forrest, Britton, Carlton M., Mayland, H. F., Buckhouse, John, Evans, Raymond A., Young, James A., and Vavra, Martin

Abstract:

Field and laboratory studies were conducted on volcanic ash from Yakima, Moses Lake, Spokane, Washington, and Moscow, Idaho, three weeks after the May 18, 1980, eruption of Mt. St. Helens in southwestern Washington. These studies examined 1) the chemical, physical, and water retentivity properties of the ash, 2) the effect...

Resource Type:

Technical Report