geological time scale meaning in English

地质时标

Era a unit of the geological time scale that is made up of several periods , e . g . the mesozoic era comprises the triassic , jurassic , and cretaceous periods
代：量度地质时期的分类单位，代由若干时期组成，如中生代包括三叠纪、侏罗纪和白垩纪。
Holocene ( recent ) the present epoch in the geological time scale , being the second epoch of the quaternary period , dating from the end of the last glaciation , about 10000 years ago , to the present day
全新世：在地质学上指第四纪的第二阶段的整个时期，它终止于最后一个冰川期，距今大约10000年。