Transport and deposition in the May 18, 1980, Mount St. Helens blast flow

Marcus I. Bursik; Andrei V. Kurbatov; Michael F. Sheridan; Andrew W. Woods

doi:10.1130/0091-7613(1998)026<0155:TADITM>2.3.CO;2

Transport and deposition in the May 18, 1980, Mount St. Helens blast flow

Marcus I. Bursik
, Andrei V. Kurbatov
, Michael F. Sheridan
, Andrew W. Woods

Earth Sciences

SUNY Buffalo
University of Bristol

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

A new, statistical sampling strategy for pyroclastic deposits has yielded data that reveal the depositional characteristics of the May 18, 1980, blast flow of Mount St. Helens. Samples were collected from each layer along a profile parallel to flow lines, as interpreted from tree blow-down directions. The decrease in the mass of sediment of different grain sizes with distance supports a turbulent-gravitational mechanism of suspended sedimentation, and transport within a dilute blast cloud having a density only slightly greater than that of the atmosphere. Traditional sampling strategies would have been unable to yield data suitable to test this settling mechanism hypothesis.

Original language	English
Pages (from-to)	155-158
Number of pages	4
Journal	Geology
Volume	26
Issue number	2
DOIs	https://doi.org/10.1130/0091-7613(1998)026<0155:TADITM>2.3.CO;2
State	Published - 1998

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10.1130/0091-7613(1998)026<0155:TADITM>2.3.CO;2

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AU - Sheridan, Michael F.

AU - Woods, Andrew W.

PY - 1998

Y1 - 1998

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AB - A new, statistical sampling strategy for pyroclastic deposits has yielded data that reveal the depositional characteristics of the May 18, 1980, blast flow of Mount St. Helens. Samples were collected from each layer along a profile parallel to flow lines, as interpreted from tree blow-down directions. The decrease in the mass of sediment of different grain sizes with distance supports a turbulent-gravitational mechanism of suspended sedimentation, and transport within a dilute blast cloud having a density only slightly greater than that of the atmosphere. Traditional sampling strategies would have been unable to yield data suitable to test this settling mechanism hypothesis.

UR - https://www.scopus.com/pages/publications/0031981220

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ER -

Transport and deposition in the May 18, 1980, Mount St. Helens blast flow

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