The canyon is a classic V-shaped valley, indicative of river-type erosion rather than erosion caused by glaciation.

大峡谷是一个典型的V形河谷。这表明了大峡谷是河道型侵蚀，而不是冰川引起的侵蚀。

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The mineral composition of each of the Canyon's 15 dominant layers influences the stone's color, type and texture a variety that is all the more evident on the side-canyon detours.

WSJ: The Grand Canyon's Secret Network