geological formation(n = noun.object) formation - (geology) the geological features of the earth;
is a kind of object, physical object
has particulars: aquifer, beach, cave, cliff, drop, drop-off, delta, diapir, folium, foreshore, ice mass, lakefront, massif, monocline, mouth, depression, natural depression, elevation, natural elevation, oceanfront, chain, chain of mountains, mountain chain, mountain range, range, range of mountains, relict, ridge, ridgeline, ridge, shore, incline, side, slope, fountain, natural spring, outflow, outpouring, spring, scree, talus, mineral vein, vein, crater, volcanic crater, wall, groundwater level, water level, water table, pillars of hercules

calque formation, formation, geological, geological dating, geological era, geological fault, geological horizon, geological period, geological phenomenon, geological process, geological time, heat of formation, military formation, pair formation, reaction formation, reticular formation, word formation