Water-dispersible colloids distribution along an alluvial fan transect in hyper-arid Atacama Desert

Geoderma(2023)

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Abstract
•Fan ages in the Atacama dated to ∼13.6 ka and ∼56.4 ka.•The younger fan with rough surfaces was dominated by nano and fine colloids.•The older fan showed smooth surface but heterogenous size distribution of colloids.•Soil depth distributions pointed to colloidal transport in the younger fan.•Plants enhanced accumulation of nanocolloids with elevated OC and Ca content.
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Key words
alluvial fan transect,desert,water-dispersible,hyper-arid
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