Zones and zonal variations in welded ash flows

Professional Paper 354-F



Welded tuffs are recognized as special parts of ash flows, other pyroclastic flows, or, more rarely, air-fall deposits. Ash flows may be emplaced at any temperature below a maximum eruption temperature. Those emplaced above a minimum welding temperature may show any and all degrees of welding and crystallization. 

Publication type Report
Publication Subtype USGS Numbered Series
Title Zones and zonal variations in welded ash flows
Series title Professional Paper
Series number 354
Chapter F
DOI 10.3133/pp354F
Year Published 1960
Language English
Publisher U.S. Geological Survey
Publisher location Washington, D.C.
Description Report: 11 p.; 2 Plates: 16.55 x 10.82 inches
First page 149
Last page 159
Online Only (Y/N) N
Additional Online Files (Y/N) N
Google Analytic Metrics Metrics page
Additional publication details