The Colorado River runs through the grand canyon.
That would just be called Weathering and Erosion. Erosion happens when rocks and sediments are picked up and moved to another place by ice, water, wind or gravity. Mechanical weathering physically breaks up rock. One example is called frost action or frost shattering. Water gets into cracks and joints in bedrock.
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I believe that it will point southwest :)
hope this helps
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The place with the lowest precipitation on earth is Arica, a port city in Chile
