成为页硅酸盐的粘土状的矿物质暗示了水和岩石的存在，就要追溯到大约46亿到38亿年前挪亚时代的火星。
The clay-like minerals, called phyllosilicates, suggest water interacted with rocks dating back to what is called the Noachian period on Mars, about 4.6 billion to 3.8 billion years ago.
这个夏天，美国宇航局的火星探测器机遇号抵达“奋进”撞击坑，这里是火星粘土状岩石的来源处，显示出这片区域曾适于居住。
NASA's Mar rover Opportunity arrived at the Endeavour crater this summer - a source of clay-like rocks which could show the area had been habitable.
这个夏天，美国宇航局的火星探测器机遇号抵达“奋进”撞击坑，这里是火星粘土状岩石的来源处，显示出这片区域曾适于居住。
NASA's Mar rover Opportunity arrived at the Endeavour crater this summer - a source of clay-like rocks which could show the area had been habitable.
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