Assertion: delta's shape | /r/HasProperty | depend on the age of its valley
Facets:
Source sentences:
text: The size, shape, and complexity of alluvial plains landforms depend on the individual river’s past experience, including the age of its valley, the long-term variations in available water and sediment, the geologic material into which the valley is carved, and fluctuations in the level of the water body into which the river flows.