Nine rock reference samples ''Sedimentary rock series'' issued by the
Geological Survey of Japan (GSJ) were analysed for up to 31 elements b
y neutron activation analysis (NAA); 14MeV-NAA for Si and Al, fission
track method for U, radiochemical and instrumental NAA for rare-earth
elements, and instrumental NAA for the remaining elements, with reacto
r neutrons for the latter three. The present results are compared with
reported values.