The rocks are frozen solid therefore there Sharp edges are not lost
Moraine is the word for rocks and boulders carried along by a glacier and then left behind.
conglomerate
This describes glacial erosion where rocks are frozen into the base of a glacier and then deposited as the glacier melts, leaving behind a trail of rocks.
Sedimentary Rocks
When a glacier melts, the rocks it carried may fall to the ground in a jumble called a moraine. This accumulation of rock, debris, and soil can form a moraine deposit at the edge or base of a glacier.
A moraine is a low ridge of rocks, sand, and soil that is deposited by a glacier as it advances and retreats. It can be found at the edges or terminus of a glacier, marking the furthest extent of the glacier's advance.
The debris left behind by a melting glacier is called "moraine." Moraines consist of a mixture of soil, rocks, and sediment that the glacier has eroded and transported. They are typically found at the edges or terminus of the glacier, forming ridges or piles that mark the glacier's former extent.
Weathering and erosion.
Moraine contain fragmented rocks.
Debris on a glacier can be found scattered on the glacier's surface, within crevasses, or concentrated at the glacier's margins. It can include rocks, sediment, and even man-made objects that have fallen or been carried onto the glacier.
Glaciers pick up rocks through a process known as glacial erosion. As glaciers move, they scrape against the land beneath them, incorporating rocks and debris into the ice. This occurs through two main mechanisms: abrasion, where the glacier grinds the rocks beneath it, and plucking, where the ice freezes around rocks and pulls them away as it moves. The collected rocks and sediments are carried along with the glacier until they are eventually deposited when the glacier melts.
Moraines carried at the bottom of glaciers are called basal or ground moraines. They consist of rocks, soil, and other debris that have been plucked and eroded by the moving glacier. Basal moraines are typically deposited at the glacier's terminus or along its path as the glacier retreats.