Stones shaped by glaciers are often not smooth due to the grinding and scraping action of the ice as it moves over the landscape. This process, known as glacial abrasion, can create jagged edges and irregular surfaces on the rocks. Additionally, the stones can be mixed with other debris and sediment, which further contributes to their rough texture. As a result, glacially transported stones often exhibit a rugged appearance rather than a polished finish.
Moraine is the accumulation of debris, boulders, stones, etc. carried and deposited by a glacier.
Drumlins
Stones are small, smooth, and usually used for decoration or construction. Rocks are larger, rougher, and can be made up of multiple minerals.
because it has a smooth out the landscape
When a Glacier moves over an area of soft or hard rock it may have smaller stones underneath it, these small stones scratch into the larger rock making the Striations. They show which direction the Glacier travelled in.
drumlin
drumlin
Yellow stones
River stones, river rock, or skipping stones
The preprosition in the sentence is "over" and the prepositional phrase is thus "over the smooth grey stones"
skipping stones!
Glaciers form smooth hills by eroding and shaping the landscape as they move down a slope. The weight of the ice and the movement of the glacier over time smooth out the terrain beneath it, resulting in the formation of long smooth hills called drumlins.