Which outcome preferentially occurs as subtropical dunes migrate downwind against desert pavement?

💡 Explanation

Concentrated heavy mineral lag deposits form because deflation removes lighter particles, leaving heavier grains; this is the winnowing process. Therefore, lag deposits concentrate, rather than uniform distribution, because transport decreases downwind from source areas where uplift is less likely.

• Which effect increases when intense offshore trawling reduces seabed bioturbation?
• Which mechanism causes increased marine productivity when coastal upwelling occurs?
• Which deformation results when magma viscosity increases within a volcanic lava dome?
• Which consequence results when eolian transport bypasses a small upwind island?
• Which consequence results when pyroclastic surge erodes volcanic slopes?
• Which outcome results when hydraulic sorting concentrates heavy sediments?