Which horizon thinning occurs when heavy rainfall increases?

💡 Explanation

Increased rainfall causes intensified leaching of minerals and organic matter from the A horizon via eluviation, because gravity and water movement carry those dissolved/suspended components downward from that initial layer. This thins the A-horizon, therefore the eluviation layer is impacted, rather than lower illuviation or inert bedrock.

• Which outcome results from thermal expansion differences in ocean currents?
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• Which outcome occurs when a debris flow exceeds infiltration?