Zones and zonal variations in welded ash flows /

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Bibliographic Details
Author / Creator:Smith, Robert L. (Robert Leland), 1920- author.
Imprint:Washington : United States Department of the Interior, Geological Survey, 1960.
Description:1 online resource (16 unnumbered pages) : illustrations + 2 plates.
Series:Geological Survey professional paper ; 354-F
Shorter contributions to general geology
Geological Survey professional paper ; 354-F.
Shorter contributions to general geology.
Subject:Volcanic ash, tuff, etc.
Volcanic ash, tuff, etc.
Format: E-Resource U.S. Federal Government Document Book
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Other authors / contributors:Geological Survey (U.S.), issuing body.
Notes:Title from title screen (viewed September 30, 2014).
"A concept of zonation in ash flows based on degree of welding and type of crystallization."
Includes bibliographical references (pages 158-159).
Other form:Print version: Smith, Robert L. (Robert Leland), 1920-. Zones and zonal variations in welded ash flows
GPO item no.:0624 (online) classification:I 19.16:354-F