claystone iku umume cukup alus, nanging bisa dadi hard lan brittle. iku formulir amarga cuaca saka mudstone.
biotite, chlorite, Feldspar, micas, muscovite utawa illite, plagioclase, pyrite, quartz
aluminium oxide, ca, NaCl, cao, wesi (iii) oxide, MgO, silikon dioksida
udan biologi, udan kimia, udan mechanical