From Longman Dictionary of Contemporary Englishcarboniferouscar‧bon‧if‧er‧ous /ˌkɑːbəˈnɪfərəs◂ $ ˌkɑːr-/ adjective technical HEGproducing or containing carbon or coal carboniferous rocks
Examples from the Corpus
carboniferous• The ones now dead, and carboniferous fruit themselves.• The layer upon layer of carboniferous fruit.Origin carboniferous (1700-1800) carbon + -iferous “containing, producing” (from Latin -fer) 