( n. )
The laying bare of rocks by the washing away of the overlying earth, etc.; or the excavation and removal of them by the action of running water.
( n. )
The laying bare of rocks by the washing away of the overlying earth, etc.; or the excavation and removal of them by the action of running water.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012