gandheng tuff, tuff rhyolitic, basaltic tuff, trachyte tuff lan tuff andesitic.
nepheline-basanite, analcite-basanite lan leucite-basanite
tansah ditemokake minangka pipo vulkanik liwat lemah ndhuwur Continental jero
clasts Gamelan kanggo tutul, gampang pecah dadi lancip piring, tahan struktural dhuwur marang erosi lan iklim, digunakake minangka Touchstone a