地质年代 meaning in Chinese
geochron
geologic ages
geologic period
geologic time scale
geological age
geological chronology
geological period
geological time
geologicalage
geologictime
plicensbachian
pliensbachian
pluteus
Examples
- The youngest rocks found on the moon are 3 billion years old .
在月球上发现的地质年代最晚的岩石已有30亿年历史了。 - This part of geologic calendar has not been satisfactorily subdivided .
这部分地质年代表还没有令人满意地再细分出来。 - Cambrian the earliest period of the paleozoic era , about 590 - 510 million years ago
寒武纪:地质年代古生代的第一个纪，在五亿九千万到五亿一千万前。 - Cretaceous the most recent period of the mesozoic era , 145 - 66 million years ago
白垩纪：地质年代中生代的最后一个纪，距今一亿四千五百万年至六千六百万年前。 - Geological dates are usually obtained by using the rates of decay of various radioactive elements found in minerals
人们通常用矿物中所发现的各种放射性元素的衰变率来计算地质年代。