What is typically found at the bottom of a river where there is a strong current?

In a river with a strong current, potholes are typically formed due to the erosion process. Potholes are cylindrical depressions that occur in the riverbed, created by the swirling motion of water and sediment. As water flows rapidly, it can carry larger particles and utilize them to abrade the riverbed, resulting in these distinctive features.

While silt, sand, and pebbles may also be present in such environments, they tend to be deposited based on the velocity of the water. In strong currents, finer materials like silt are more likely to be suspended and carried away, while larger materials, such as pebbles, might not form unique features and are often found scattered along the riverbed instead. Potholes represent the specific interaction of moving water with the physical structure of the riverbed, showcasing the erosive power of a strong current over time.