My professor studies flora of the Palaeozoic Era.
我的教授研究古生代的植物群。
Like the Palaeozoic Era, the Mesozoic Era has been divided into smaller units of geological time called period.
如同古生代一样，中生代也可划分成一些叫纪的较小的时间单位。
The basement strata and the migmatite, however, were formed much later, about Cambrian period and early palaeozoic era.
但其基底地层和混合岩形成时代较晚，为寒武纪和下古生代。
In the research area, the coal series in late Palaeozoic era were mainly formed from epeiric sea - coastal plain environment.
研究区晚古生代含煤岩系主要形成于陆表海—海岸平原环境中。
The second major era of geological time which lasted from the end of the Palaeozoic era about 225 million years ago, to the start of the Tertiary, some 70 million years ago.
中生代是地质时期的第二个大时代，从大约2.25亿年前的古生代末延续到约7千亿年前的第三纪初。
Based on the study of sporopollen fossils from the coal-bearing formation of the late Palaeozoic Era in Tangyang mine field of Jining, 71 genera and 177 species of sporopollen are identified.
通过对济宁唐阳井煤田晚古生代含煤岩系中的孢粉化石的研究，共鉴定出孢粉化石71属177种。
During Palaeozoic era and Triassic period, Taikang area received Marine, continental-marine transition, and continental sediments, then uplifted in the end of Triassic and was denuded widely.
太康地区古生代至三叠纪接受了海相、海陆过渡相和陆相盆地沉积，三叠纪末隆起，地层广遭剥蚀。
During Palaeozoic era and Triassic period, Taikang area received Marine, continental-marine transition, and continental sediments, then uplifted in the end of Triassic and was denuded widely.
太康地区古生代至三叠纪接受了海相、海陆过渡相和陆相盆地沉积，三叠纪末隆起，地层广遭剥蚀。
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