Large boulders and smaller rocks can be carried by a river. When rocks and sediment are displaced, it's called erosion.
A river channel is formed by rock and soil of a stream being transported down, during this process the channels become wider and deeper.
Because the pieces of rock are eroded a it passes down to the bottom of the river.
riprap
waste transported from the river!
igneous rock
The Theatre it was transported across to create the Globe
water was transported from you and me. To make a big mountainj. Narnia
Igneous rock is transported by wind or moving water until they are deposited in other regions where they settle in layers.
A grain of sand
When a sharp irregularly shaped rock falls into a river, it typically begins to be smoothed and rounded over time due to the constant flow of water and the movement of sediment. The water erodes the rock's sharp edges and corners, gradually changing its shape. Additionally, the rock may become embedded in the riverbed or transported downstream, depending on the river's current and the rock's size and weight. This process is a part of the natural cycle of erosion and sedimentation in river ecosystems.
This process is called erosion. Erosion occurs when running water, like a river, picks up and carries away rock particles, eventually depositing them in another location.
The conglomerate rock you're describing likely formed from the deposition of large, angular fragments that were transported by water or ice and then fused together during the lithification process. The angular nature of the fragments suggests that they were not significantly transported from their source, indicating a nearby origin for the rock.