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← GeographyWhich characteristic indicates the equilibrium line altitude lowering on a cirque glacier?
A)Increased horn formation in adjacent valley
B)Expanded bergschrund and crevasse formation
C)Larger proglacial lake development✓
D)Elevated trimline indicating ice thinning
💡 Explanation
When the equilibrium line lowers, net accumulation decreases and net ablation increases because the meltwater runoff increases significantly, leading to a proglacial lake expansion. Therefore, a larger proglacial lake forms, rather than increased horn formation, bergschrund formation, or elevated trimline which result from other glacial processes.
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