* Unsorted: Glaciers act like giant bulldozers, picking up rocks of all sizes from the landscape. They don't have the ability to sort the material by size like a river does. This leads to a mix of boulders, pebbles, sand, and silt all jumbled together.
* Angular: Glaciers grind rocks together as they move, creating sharp, angular edges. This is in contrast to river-deposited sediment, which tends to be more rounded from abrasion.
This type of deposit is called glacial till. It's a characteristic feature of glacial environments and can be used to identify past glacial activity.
