What geological feature is an example of sediment transport by water currents?

A sand bar is a geological feature formed by the accumulation of sand and sediment transported and deposited by the action of water currents, typically in rivers, lakes, or coastal environments. As water flows, it carries sediment, which can then settle in certain areas due to a decrease in velocity, forming a sand bar. This accumulation is often shaped by the dynamics of the current, including factors such as flow speed and the availability of sediment. Sand bars can alter water flow patterns, support various ecosystems, and can even become visible during low tide.

In contrast, a tombolo is a specific type of sandbar that connects an island to the mainland, developed through similar sediment transport processes, but its function is more about connectivity rather than just transport. A canyon is a deep, narrow valley carved by erosion, primarily through geological processes rather than sediment transport by current. Similarly, a mountain is a large landform resulting from tectonic forces rather than sediment transport. Thus, a sand bar directly illustrates the effects of water currents on sediment transport and accumulation.