Clay accumulation increases markedly when which pedogenesis mechanism occurs?

💡 Explanation

Illuviation is deposition of soil material that is leached from upper soil horizons; clay accumulates because smaller clay particles are transported downward in soil profiles, therefore increasing clay percentages rather than sand and silt.

• Which risk increases when parabolic dunes migrate aggressively inland?
• Which flow regime change occurs during alluvial terrace formation?
• Which cave-system change occurs during rapid glacial melt?
• Which consequence results when sediment-laden flow exits a constricted canyon onto an unconfined valley floor, exceeding the transport capacity?
• Which outcome is driven when the Juan de Fuca plate subducts?
• Which outcome frequently occurs when a continental plate overruns a hydrated oceanic plate?