Ash-flow tuffs
Subtitle: their origin, geologic relations, and identification
By: by Clarence S. Ross and Robert L. Smith.
Contributors: Smith, Robert L.
Series: Geological Survey professional paper -- 366
Publisher: U.S. Govt. Print. Off.
Published: 1960
Place of publication: Washington
Language: eng; ita
Number of pages: 81
Subjects: Volcanic ash, tuff, etc.; Mineralogy, Determinative.
Notes: "A study of the emplacement, by flowage, of hot gas-emitting volcanic ash; its induration by welding and crystallization, and criteria for recognizing the resulting rock."

Includes bibliographical references (p. 50-54) and index.