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.

• Following a volcanic eruption, what feature indicates renewed magma ascent to form a lava dome?
• Which outcome occurs when rapid groundwater extraction lowers the potentiometric surface in karst regions?
• Which outcome occurs when differential stress exceeds rock strength?
• Which outcome develops when longshore currents encounter a headland?
• Which outcome increases when polar ice melt accelerates?
• Which landscape outcome results with increased carbonic acid?