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ash tuff lapillistone and lapilli tuff

definition Pyroclastic rock in which less than 25 percent of rock by volume are more than 64 mm in longest diameter. Includes tuff, lapilli tuff, and lapillistone. more like this
source Schmid 1981; LeMaitre et al. 2002 more like this
Resource original
Concept original
broader original
narrower ash_tuff_lapillistone_and_lapilli_tuff original
in scheme simplelithology original
is primary topic of ash_tuff_lapillistone_and_lapilli_tuff