Which process determines the angle of repose of an alluvial fan deposit formed by debris flow?

💡 Explanation

When debris flows deposit material, the angle of repose is reached because the frictional forces between particles, influenced by their size and shape distributions, balance the force of gravity. Therefore, grain size and friction dictate the slope, as opposed to mineral solubility, oxidation, or capillarity which affect other sediment consolidation properties.

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