A moraine is an accumulation of glacial debris (till) formed by the movement of a glacier. Moraines can be found in various forms, such as lateral, medial, and terminal, depending on their position relative to the glacier. They are important indicators of past glacial activity and are used to reconstruct the history of glaciation.
Reference: Benn, D. I., & Evans, D. J. A. (2010). “Glaciers and Glaciation.” Routledge.