Which geological outcome dominates at the apex of an actively forming alluvial fan?

💡 Explanation

At the apex of an alluvial fan, the high flow energy and sediment load cause rapid aggradation and frequent channel avulsion, leading to braided stream formation because the flow lacks a stable single channel. Therefore, braided streams dominate, rather than oxbow lakes (low-gradient floodplains), trenches (subduction zones), or dunes (arid environments).

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