断だん層そう山さん地ちだんそうさんちMeanings1nounfault-block mountainsGeological term for mountains formed by faulting, where blocks of the Earth's crust are uplifted or tilted.日本にほんの断だん層そう山さん地ちは、地ち殻かく変へん動どうによって形けい成せいさ