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← GeographyWhich outcome will occur following pyroclastic surges entering floodplains?
A)Increased channel avulsion frequency downstream✓
B)Localized soil salinity reduction occurs
C)Rapid formation of volcanic plugs
D)Depletion of dissolved oxygen increases
💡 Explanation
Pyroclastic flows deposit debris, dramatically changing sediment supply and causing heightened aggradation; therefore, increased avulsion happens, rather than salinity changes or immediate plug formation, because avulsion matches increased floodplain sediment load changes.
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