The vitreous tuff has a vitreous tuff structure, and the content of vitreous debris accounts for more than 50% of the total amount of volcanic debris, followed by crystal debris and debris, which are cemented by volcanic ash. The shape of glass debris is as mentioned above, and the common ones are chicken bone, arcuate, and arcuate polygonal shape. Devitrification is a common phenomenon in glass debris, which is a fine devitrification structure, a comb-shaped devitrification structure, and a spherical devitrification structure. First, the lithology is determined according to the composition of the crystal debris, and then the secondary debris is further named, such as rhyolitic crystal detrital vitreous tuff, andesite vitreous detrital tuff, etc.

The crystalline tuff has a crystalline tuff structure, and the crystalline content accounts for more than 50% of the total content of volcanic debris, followed by glass debris and lithic debris, which are cemented by volcanic ash. The common crystal debris components are feldspar and quartz, and sometimes a small amount of biotite, amphibole, pyroxene, epidote, etc., and neonite, leucite, etc. can also be seen when the rock is alkaline.
Detrital tuff has a detrital tuff structure, and the content of detritus accounts for more than 50% of the total amount of volcanic debris. Under the microscope, these cuttings can be seen to have the structural and structural characteristics of the original rock. Common variants are andesite clastic tuff and andesite clastic breccia tuff.