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← GeographyWhere does the formation alluvial fans often occur when a river empties into a lake?
A)Near the river's continental divide.
B)Within downstream submarine canyons
C)At a tectonically-formed rift valley.
D)Along the basin's shallow lacustrine zone.✓
💡 Explanation
When a river enters a lake, the decreased flow competence promotes sediment deposition, creating alluvial fans because the water slows down and spreads out in the lacustrine environment. Therefore, alluvial fans develop by shallow lacustrine setting rather than higher-gradient, submarine or tectonic settings.
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