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River valleys are probably the most common valley on the earth. They are carved by a river into the shape of the letter v, and that is why they are called v shaped valleys.
River valleys are formed when a river runs near mountains or cliffs. Two mountains meet at the bottom of the of the valley and in between flows a river. Erosion moves sediments into the river and then the river moves the sediments to other places. Erosion is the movement of sediments from one place to another. The agents of erosion are water, ice, wind and humans because erosion can also be manmade. Sediments are small pieces of rock which are broken down by weathering which is when pieces of rock break down into pieces by wind or water. But river valleys are formed that way through eroding water.
Where do You Find Them
You find river valleys in areas where there are mountains or hills. That is because valleys are areas were mountain or hills meet. There is a river valley in Hawaii called The Lao valley and it looks like a perfect v. There is also a river valley in the mountains of the Swiss Alps called the Muretto Pass.
The Most Famous River Valley
The most famous river valley is the Yangtze and it is also the longest. It is found in China and is 6,300 kilometers long. 400,000,000 people live there that is equal to one third of China’s population. The Yangtze River is the third largest in the world.
I think that in the future river valleys will get deeper and deeper because water will carve deeper down over time. But it could take thousands and thousands of years for that to happen. Also I think that in the future there will be more river valleys because later on more mountains will form. So then there will be more river valleys.
Article posted February 17, 2011 at 04:39 AM •
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