Valleys that have been carved by glaciers and have became submerged by rising sea level are called:

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Valleys that have been carved by glaciers are called fjords when they become submerged by rising sea level. Cirques are circular depressions formed at the head of a glacier, horns are sharp mountain peaks formed by the intersection of multiple cirques, and kettle lakes are formed when a block of ice breaks off from a glacier and is buried by sediment.

Valleys That Have Been Carved by Glaciers and Have Became