秘鲁彩虹山的七彩条纹之谜
Deep in the Andes mountains of Peru, there is a very special place. It is called Vinicunca, or Rainbow Mountain. The ground shows bright stripes of colour. It looks like a painting on the earth.
The mountain got its colours over a very long time. Many layers of different minerals sat under the ground. Minerals are natural materials, like salt or iron. Each mineral gives a different colour.
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