geological phenomenon(n = noun.phenomenon) - a natural phenomenon involving the structure or composition of the earth;
is a kind of natural phenomenon
has particulars: earthquake, quake, seism, temblor, endogeny, alluvial cone, alluvial fan, cataclysm, catastrophe, continental drift, alluviation, deposit, sedimentation, alluvion, deluge, flood, inundation, frost heave, frost heaving, transgression, volcanism

acoustic phenomenon, atmospheric phenomenon, chemical phenomenon, electrical phenomenon, fere phenomenon, ferranti phenomenon, geological, geological dating, geological era, geological fault, geological formation, geological horizon, geological period, geological process, geological time, mechanical phenomenon, natural phenomenon, optical phenomenon, organic phenomenon, phenomenon, physical phenomenon, psychic phenomenon, tarchanoff phenomenon