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← GeographyWhich consequence results when tephra deposition on glaciers accelerates melting?
A)Increase in volcanic explosivity index
B)Formation of glacial outburst floods✓
C)Enhanced silicate weathering rates
D)Atmospheric ozone layer depletion
💡 Explanation
Glacial melting increases because tephra lowers surface albedo increasing solar radiation absorption via positive feedback; therefore, water accumulates and potentially breaches ice dams causing 'Jökulhlaups', rather than affecting volcanic explosivity.
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