Grand Canyon
The rever meandering in the north is the Colorado reiver. The valley 10 to 20km in width cutting along the river is the Grand Canyon. At first glance, the Colorado river appears to be flowing on the surface, but in fact is lower than the surrounding area by about 1,500m. It is highly likely that this hallucination is caused by the shades where they are sharply scooped and reflected against the sidewalls.
The yellow area located in the south-western part of an image is a dry zone, while the north-eastern part is comparatively rich in vegetation. The greatest valley in the world reaches a total of 450km, only fourth of which is seen in the image.
Along its full length of 450km, the highland cliffs are over 1,500m high, being formed by upheavals, rising nearly horizontally to the lnad surface, during the Mesozoic, the Paleozoic and pre-Cambrian periods of 200 to 600 million years ago. It is estimated that more than 10 million tons of earth and sand have carried down stream, taking less than 1 million years, which is equivalent to its infancy in nature.
These deep valleys are made up of strata like annual rings, which have turned out to be a geological treasure box. Moreover the sheer contrast of the colors of the sidewalls, changing as the sun passes overhead creating light and shade, fascinate people who visit there to see the formative beauty of nature.
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