Ora Kasadhiya
Flint, jasper, radiolarite, chert umum, chalcedony, agate, onyx, opal, magadi-jinis chert, porcelanite, Sinter siliceous
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