礫岩: conglomerate

a mountain (large mass of earth and rock) or (large) hill / a mine (excavation usually consisting of small tunnels) / a heap, pile / the top or high part of an object / a chance, gamble / a climax, peak

(geology) conglomerate

configuration, structure, construct, constitution

compose; constitute / configure

mainly, primarily

鬲: a cauldron with three hollow legs used in ancient China / 暦: calendar / 礫: gravel

歴: history

履歴: log; personal background

歴任: hold consecutive jobs