excavation Synonyms

digging archeological site dig mining paleology underbuilding tunnel trough trench trenching terracing moat shaft scooping removal quarry pit shoveling hollowing out pits slit trench pithead mines coalface coalfield nullah deracination mineshaft strip mine digs diggings digging up valley unearthing mine indentation hollow cutting cut crater concavity concaveness colliery channelling cavity cavern burrow blasting basement avulsion