Simple Lithology

ash tuff lapillistone and lapilli tuff

http://resource.geosciml.org/classifier/cgi/lithology/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
type
Resource
Concept
broader pyroclastic rock
narrower ash tuff lapillistone and lapilli tuff
in scheme simplelithology
is primary topic of ash tuff lapillistone and lapilli tuff