甘肃内蒙古北山地区古生代地壳演化-西北地质-西北地调 关键词： 北山地区,古生代,板块构造体制,造山作用 [gap=1538]Key words： Beishan area, Palaeozoic, plate tectonic system, orogenesi
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palaeozoic era 古生代 ; 古生
upper palaeozoic 上古生界
palaeozoic stratum 古生代层
Palaeozoic relief 古生代地形起伏
palaeozoic group 古生界
Palaeozoic fold belt 古生代褶皱带 ; 古生代褶曲带
Palaeozoic source rock 古生代生油岩
Early Palaeozoic Era 早古生代
There occurred a progressive fall of sea level after the middle Late Cambrian,and the Early Palaeozoic first-order sea-level variation cycle was terminated at the end of the Silurian period.
中寒武世后为累进式海平面下降。 志留纪未结束早古生代海平面一级变化周期。
参考来源 - 扬子东南大陆边缘晚元古代—早古生代层序地层和盆地动力演化(英文)·2,447,543篇论文数据，部分数据来源于NoteExpress
ADJ of, denoting, or relating to an era of geological time that began 600 million years ago with the Cambrian period and lasted about 375 million years until the end of the Permian period 古生代的
N the Palaeozoic era 古生代时期
My professor studies flora of the Palaeozoic Era.
我的教授研究古生代的植物群。
Found in the scales of Palaeozoic fishes as a superficial layer over a dentine structure.
发现于古生代鱼类的鳞片形成覆于齿质结构之上的表面层。
A Palaeozoic low - grade metamorphosed sedimentary clastic sequence occurs in Vinson Massif , Antarctica.
文森峰的地层为一套古生代浅变质沉积碎屑岩系。
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