Measurement of radioactivity in mount st. helens volcanic ash by x/γ ray spectrometry

1981 ◽  
Vol 28 (1) ◽  
pp. 244-248 ◽  
Author(s):  
M. G. Strauss ◽  
I. S. Sherman ◽  
R. H. Pehl
Keyword(s):  
Volcanic Ash ◽  
Γ Ray ◽  
Mount St Helens

Lung clearance of neutron-activated Mount St. Helens volcanic ash in the rat

1984 ◽  
Vol 35 (1) ◽  
pp. 211-217 ◽  
Author(s):  
Alfred P. Wehner ◽  
Connie L. Wilerson ◽  
Donald L. Stevens
Keyword(s):  
Volcanic Ash ◽  
Lung Clearance ◽  
Mount St Helens

VOLCANIC ASH LAYERS OF RECENT AGE AT BANFF NATIONAL PARK, ALBERTA, CANADA

1967 ◽  
Vol 4 (1) ◽  
pp. 155-161 ◽  
Author(s):  
J. A. Westgate ◽  
A. Dreimanis
Keyword(s):  
National Park ◽  
Volcanic Ash ◽  
Crater Lake ◽  
Source Area ◽  
Mineralogical Composition ◽  
Coast Mountains ◽  
Radiocarbon Age ◽  
Banff National Park ◽  
Ash Deposit ◽  
Mount St Helens

Three distinctive volcanic ash layers are present in the postglacial sediments at Banff National Park, Alberta. The chemical and mineralogical composition of the ash deposits, together with the radiocarbon age of associated charcoal, indicate the presence of Bridge River ash, whose source area is approximately located in the heart of the southern Coast Mountains, British Columbia, and Mazama ash, derived from Mount Mazama at Crater Lake, Oregon. A maximal age for Bridge River ash is 2 670 ± 140 years B.P. (GSC-531); a minimal age is 2 120 ± 150 years B.P, (G5C-577). Mazama ash is established as being about 6 600 years old, although a slightly younger date of 6 020 ± 90 years B.P. (S-191) was obtained on organic matter associated with this ash at Banff National Park. The source and age of the third ash deposit is not definitely known, but the presence of cummingtonite suggests that it might be St. Helens Y ash, derived from Mount St. Helens, Washington.

Growth of cells in culture treated with the soluble component of volcanic ash from Mount St. Helens

1982 ◽  
Vol 14 (3-4) ◽  
pp. 137-141 ◽  
Author(s):  
Howard L. Hosick ◽  
Christine A. Carrington ◽  
John C. Angello ◽  
P.O. Zamora
Keyword(s):  
Volcanic Ash ◽  
Cells In Culture ◽  
Soluble Component ◽  
Mount St Helens

The Effect of Mount St. Helens' Volcanic Ash on Plant Growth and Mineral Uptake

1983 ◽  
Vol 12 (3) ◽  
pp. 415-418 ◽  
Author(s):  
V. L. Cochran ◽  
D. F. Bezdicek ◽  
L. F. Elliott ◽  
R. I. Papendick
Keyword(s):  
Plant Growth ◽  
Volcanic Ash ◽  
Mineral Uptake ◽  
Mount St Helens
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