its called silt
Silt.
bits and pieces of rock get carried away.
Nile River In Egypt!
If a rock falls into a stream or river, they can get transported (carried away). As they are moved by the water, the rock fragment knock against each other and wear away. This is called ABRASION. This bits of rock or sand in streams are called Sediment.
silt
Rock Snot
You can be carried by hand or me carried by a river. It depends on what size.
sediment
Sediment.
the process by which bits of broken rock are carried away and the slow downhill movement of rock and soil.
....rock filled rapids.
The Great Pyramid consists of more than 2.3 million limestone blocks. The Egyptians shipped the limestone blocks from quarries all along the Nile River. The stone was cut by hammering wedges into the stone. Next the wedges were soaked with water. The wedges expanded, causing the rock to crack. Once they were cut, they were carried by boat either up or down the Nile River to the pyramid.