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GEOREF RECORD

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

Marcus I. Bursik, Andrei V. Kurbatov, Michael F. Sheridan and Andrew W. Woods
Transport and deposition in the May 18, 1980, Mount St. Helens blast flow
Geology (Boulder) (February 1998) 26 (2): 155-158

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.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 26
Serial Issue: 2
Title: Transport and deposition in the May 18, 1980, Mount St. Helens blast flow
Affiliation: State University of New York at Buffalo, Department of Geology, Buffalo, NY, United States
Pages: 155-158
Published: 199802
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 26
Accession Number: 1998-022957
Categories: Quaternary geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sketch map
N46°19'60" - N46°19'60", W122°15'00" - W122°15'00"
Secondary Affiliation: University of Bristol, GBR, United Kingdom
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 199809
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