jinis
Flint, jasper, radiolarite, chert umum, chalcedony, agate, onyx, opal, magadi-jinis chert, porcelanite, Sinter siliceous
Ora Kasadhiya
fitur
clasts Gamelan kanggo tutul, gampang pecah dadi lancip piring, tahan struktural dhuwur marang erosi lan iklim
biasane blentongé ireng lan putih.