Ash-flow tuffs
Subtitle: their origin, geologic relations and identification
By: [by Clarence S. Ross and Robert L. Smith] and, Zones and zonal variations in welded ash flows / [by Robert L. Smith]. With a foreword by Robert L. Smith ; managing editor, Jonathan F. Callender.
Contributors: Smith, Robert L.; Callender, J. F.; Smith, Robert L.
Series: Special publication / New Mexico Geological Society -- no. 9; Special publication (New Mexico Geological Society) -- no. 9
Publisher: Available from New Mexico Bureau of Mines and Mineral Resources
Published: 1980
Place of publication: Socorro
Language: eng
Number of pages: 105
Subjects: Volcanic ash, tuff, etc.
Other titles: Zones and zonal variations in welded ash flows.
Notes: "Reprinted from U.S. Geological Survey Professional papers 354-F and 366."

Includes bibliographies and index.