Zungenbecken
A Zungenbecken (German pronunciation: [ˈtsʊŋənˌbɛkn̩]), also called a tongue basin or tongue-basin, is part of a succession of ice age geological landforms, known as a glacial series. It is a hollow that is left behind by the ice mass, as the snout of the glacier (German: Gletscherzunge, lit. 'glacier tongue') recedes, which initially fills with meltwater, forming a proglacial lake, and later may be filled with surface water from streams or precipitation.