论文部分内容阅读
迄今,地球上发现的最古老岩石大约是38亿年。30—38亿年的岩石比过去想象的要更加普遍,在所有前寒武地盾上都可能找到它们,并与常见的27亿年的岩石搀和在一
To date, the oldest rocks found on Earth are about 3.8 billion years old. The 3.0-38 billion year rock is more prevalent than previously thought and may be found on all Precambrian shields and mixed with the common 2.7 billion years rock