Ash-flow tuffs
Subtitle: their origin, geologic relations and identification
By: [Clarence S. Ross and Robert L. Smith] ; and Zones and zonal variations in welded ash flows / [by Robert L. Smith] ; with foreword by Robert L. Smith.
Contributors: Smith, Robert L. 1920-
Series: Special publication / New Mexico Geological Society -- no. 9.; Special publication (New Mexico Geological Society) -- no. 9.; Professional paper (United States. Geological Survey) -- 354-F, 366.
Publisher: New Mexico Geological Society
Published: 1980
Place of publication: [S.l.]
Language: eng
Number of pages: 108
Subjects: Volcanic ash, tuff, etc.; Mineralogy, Determinative.; Ignimbrite.
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.