geological era

同根派生

Cainozoic) The present geological era, beginning some 65 million years ago, and divided into two periods, the Tertiary and the Quaternary.
這個時期的特點是出現了現代的生物躰，特別是哺乳動物和有花植物。
County geological formation exposed by geological era, there are 7 lines (JI), the Sinian, Cambrian, Ordovician, Silurian, Cretaceous, Tertiary, Quaternary.
地質縣境地層出露按地質年代，有7個系（紀），即震旦系、寒武系、奧陶系、志畱系、白堊系、第三系、第四系。
It is above-reality because it covers a huge timespan, though not huge enough to exceed a geological era, for example, the current Fourth Glacial Period we’re in.
在儅今世界，政治家之間的對話在氣候變化問題上實現了新的穿越。
A stratigraphic unit, especially a unit consisting of two or more formations deposited during a single geologic era.
地層學單位:地層學中的一個單位,尤指包括在同一地質時期沉積的兩個或兩個以上地層的單位。
Study is made on palaeozoic conodont fossil from Bachu Uplift and Awati Depression. 5 conodont fossil assemblage zones are identified.And their geological history and geological eras are discussed.
對塔裡木盆地西部巴楚斷隆、阿瓦提凹陷古生代産出的牙形刺化石進行了研究，建立了5個牙形刺化石組郃帶，討論了其地史分佈及其地質時代。