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汉语拼音：gǔ shēng dài

地质历史中起自约57亿年前至25亿年前的时代。持续时间约32亿年。分为寒武纪、奥陶纪、志留纪、泥盆纪、石炭纪和二叠纪等六个纪。该时期形成的地层称古生界”。生活的生物群以无脊椎动物为最重要。中国该时期主要分布海相地层。在中后期形成了不少含煤地层。

1. 地质年代的第三个代，约开始于五亿七千万年前，结束于二亿三千万年前。分为寒武纪、奥陶纪、志留纪、泥盆纪、石炭纪、二迭纪六个纪。在这个代里生物界开始繁盛：动物以海生的无脊动物为主，脊椎动物有鱼和两栖动物出现；植物有蕨类和石松等，松柏也在这个时期出现。

   徐迟 《地质之光》：“ 李四光 放眼全球，指出 欧 亚 大陆，自古生代以来，就在往南推动。”

• The stratigraphic column in this district includes all the Paleozoic formations.

  这个地区的地层柱包括全部古生代岩系.

• The priciple of cyclic sedimentation applies to deposits dating from earliest Paleozoic time to the Holocene.

  旋回沉积原理适用于始于最早的古生代迄至全新世的沉积物.

• The deposition velocity of Paleozoic, Mesozoic and Cenozoic assumes unimodal pattern.

  在沉积速率分析曲线上,往往是古生代 、 生代和新生代呈单峰状态.

• The research of seismites mostly focuses on the marine stratum before Paleozoic.

  目前国内外学者对震积岩的研究主要集中在古生代以前的海相地层.

• South Tianshan: a Late Paleozoic or a Triassic orogen?

  南天山: 晚古生代还是三叠纪碰撞造山带?

• 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.

• The Palaeozoic was also the era when fishes, amphibians and reptiles appeared.

  在古生代,鱼类 、 两栖动物、爬行动物也开始出现.

• The Proterozoic and Palaeozoic are two main metallogenic periods in the region.

  西北地区以元古宙-古生代金属成矿为显著特色.

• My professor studies flora of the Palaeozoic Era.

  我的教授研究古生代的植物群.

• The stratigraphic trap formed in late Paleozoic era.

  地层圈闭主要形成于晚古生代.

• Based on gravity and magnetic data the existence and boundary of palaeo - Junggar land were discussed.

  依据重磁力和地壳厚度等资料,论述了准噶尔古陆片的存在及其边界,并认为其上有古生代的陆表海沉积.

• Penetrated the Paleozoic era for the former and as early as the late Paleozoic.

  侵入时代为前古生代和早古生代晚期.

• There are few survivors of the animals that lived in the Paleozoic period.

  古生代的动物现今已鲜有孑遗.

• Geology: tectonics, is a mid - and late Paleozoic uplift of the land into the North China platform.

  地质: 大地构造, 属古生代中后期抬升成陆地的华北地台.

• Kufra Basin is a large Palaeozoic intracratonic sag basin, which is formed on the crystallization basement.

  库弗腊盆地是在稳定结晶基底上形成的大型古生代克拉通内坳陷盆地.