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Zones and zonal variations in welded ash flows.

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"A concept of zonation in ash flows based on degree of welding and type of crystallization."

Bibliographic Details
Main Author: Smith, Robert L. (Robert Leland), 1920-
Format: Government Document Book
Language:English
Published: Washington : U.S. Govt. Print. Off, 1960.
Series:Professional paper (Geological Survey (U.S.)) ; 354-F.
Shorter contributions to general geology.
Subjects:
Volcanic ash, tuff, etc.
Ignimbrite.
Description
Summary:"A concept of zonation in ash flows based on degree of welding and type of crystallization."
Physical Description:149-159 pages : illustrations, map (in pocket) ; 29 cm.
Bibliography:Includes bibliography.