noun-modifying (irregular)
clastic
Geological term describing rocks or sediments composed of broken fragments of pre-existing minerals and rock. Used prenominally in compounds like 砕屑岩 (clastic rock).
Clastic rocks are formed from fragments of pre-existing rocks.
detritus; clastic material
Compound of 砕 (sai, 'break, crush') and 屑 (setsu, 'fragment, scrap'). The term is a direct translation of the English geological term 'clastic'.