Which soil horizon characteristic results from eluviation processes?

💡 Explanation

Eluviation involves the leaching of materials from the A horizon; this depletion of clays, organic matter, and oxides leaves a light-colored, nutrient-poor layer at the top of the soil profile, because the flow of soil water removes these materials, rather than depositing/transforming material in place.

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• Which outcome will likely occur following sustained pyroclastic surges within a deeply eroded valley?
• Which large-scale effect results when cold stream runoff reduces thermohaline circulation?
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