A glacial moraine is an accumulation of unsorted glacial debris (till) that has been transported and deposited by a glacier. Moraines can form at the edges, terminus, or beneath the glacier, and are key indicators of past glacial activity, ice movement, and climatic conditions. Types of moraines include terminal, lateral, and medial moraines.
Reference: Benn, D. I., & Evans, D. J. A. (2010). Glaciers and Glaciation. Routledge.