geological formation

a geological formation consisting of an underground enclosure with access from the surface of the ground or from the sea v

n a geological formation consisting of an underground enclosure with access from the surface of the ground or from the sea v hollow out as if making a cave or opening v explore natural caves

a bowl-shaped geological formation at the top of a volcano n

a sunken or depressed geological formation

n an elevated geological formation n an inclined surface connecting two levels v have a tendency or disposition to do or be something