Which mechanism sorts sediment in alluvial placer deposits?

💡 Explanation

Density-driven gravitational separation concentrates denser minerals like gold in alluvial placers because higher density materials settle faster in fluid flows as velocity decreases; therefore, gold accumulates in specific locations rather than being uniformly distributed by fluvial transport activities.

• Which outcome results, when a glacial surge transports sediment?
• Which outcome regularly results from prolonged chemical weathering of felsic bedrock?
• Which consequence results when lateral displacement along a transform fault locks?
• Which mechanism causes increased soil liquefaction following land reclamation using alluvial deposits rich in silt?
• Which pedologic outcome results with intense grassland bioturbation?
• Which outcome reduces forest carbon sequestration when pedogenesis declines?