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The World's Largest Natural Arch Is A Secret Stone Landmark Towering Over A River In ChinaThe limestone arch gracefully bows over the Buliu River, creating a 230-foot high ... two streams or a single stream's bend. Over time, erosion weakens the rock until it collapses, leaving behind ...
Erosion is the process that wears away the river bed and banks. Erosion also breaks up the rocks that are carried by the river.
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