gandheng tuff, tuff rhyolitic, basaltic tuff, trachyte tuff lan tuff andesitic.
rocks pumice, rocks obsidian, rocks perlite, rocks porphyritic.
tansah ditemokake minangka pipo vulkanik liwat lemah ndhuwur Continental jero
ngandhut asam ing alam, kasedhiya ing persil saka werna