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← GeographyWhich consequence results when a levee system catastrophically fails adjacent to an alluvial plain underlain by silt?
A)Deposition of crevasse splay sediments✓
B)Increased rates of glacial isostasy
C)Formation of a shield volcano
D)Intensified chemical decomposition of bedrock
💡 Explanation
A levee breach causes rapid sediment deposition because avulsion results in flow divergence and decreased stream power upon the alluvial plain. Therefore, crevasse splay sediments are deposited, rather than isostasy/volcanism/decomposition which require different drivers.
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