Ash-flow tuffs: Their origin, geologic relations, and identification
January 1, 1961
Pyroclastic materials, which are interpreted as having been deposited by flowage as a suspension of ash in volcanic gas, are becoming widely recognized as major geologic episodes. These may be unconsolidated, indurated by partial welding, or welded into a compact rock. Many students are working on these materials and the interest in them is so widespread that need for a coordinated treatise on them has developed. This report deals with the history of the concept of their origin; gives detailed descriptions of their character and mode of occurrence; gives criteria for their recognition; and considers their distribution and consolidation.
Citation Information
Publication Year | 1961 |
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Title | Ash-flow tuffs: Their origin, geologic relations, and identification |
DOI | 10.3133/pp366 |
Authors | Clarence S. Ross, Robert L. Smith |
Publication Type | Report |
Publication Subtype | USGS Numbered Series |
Series Title | Professional Paper |
Series Number | 366 |
Index ID | pp366 |
Record Source | USGS Publications Warehouse |