As the glaciers expanded, due to their accumulating weight of snow and ice, they crushed and redistributed surface rocks, creating erosional landforms such as striations, cirques, and hanging valleys.
They crushed. This was due to their accumulating weight of snow and ice. They redistributed surface rocks. This was due to their accumulating weight of snow and ice. They was creating erosional landforms such as striations, cirques, and hanging valleys. This was due to their accumulating weight of snow and ice. The glaciers expanded.