Ice-dammed

I will merely say that only one of two conclusions seems open to us; either the terraces and water-marks are old sea-margins, or else they are the margins of huge ice-dammed lakes.

Source: wiktionary

our base camp was pitched on the marginal moraine close to the eastern scarp of Kverfkjöll and overlooking a little ice-dammed lake.

Source: wiktionary

So long as evidence for the existence of the ice-dammed lakes does not simply consist of the meltwater channels themselves, the interpretation of such meltwater channels as overflows cannot be disputed.

Source: wiktionary

At the height of the cold stage a massive front of ice sat over the Midlands and north London, and south of it were huge lakes filled by spring thaws and ice-dammed rivers, such as the Thames.

Source: wiktionary