古生代

But most split trace of samples with tapered profile had been cutted, of which some presented sharp implement with double side shaved, and some even obviously possessed bitted or scrapped "imprint".

结合地理环境和地学结构分析，猛虎洞可能属晚更新世(10~5)万年前旧石器人类穴居的营地或系同生代古脊推动物的遗址。

, 5. 0±0.4 ‰. They are different obviously from those of fossil brachiopods in other paleozoic periods and modern shells.

因此无论是δ〓O，还是δ〓C都与古生代其它地质时期以及现代腕足生物壳体存在很大差别，表明地质历史时期碳酸盐岩的原始氧、碳同位素组成并不是稳定不变的。

Upper Plate rocks consist of a variety of lithologies varying from Paleozoic to Tertiary in age and are locally highly faulted and tectonically juxtaposed.

上层板块岩石由各种不同岩性从古生代到高等教育在年龄和当地高度构造断陷和并列。

Cambro-Ordovician mudstones,upper Cambrian and Carboniferous gypsum rocks and the relatively tight lithologies have blocked the vertical migration of formation fluid s in Tarim basin.

塔里木盆地古生代寒武—奥陶纪泥岩、晚寒武世和石炭纪的膏岩层及较为致密的岩性阻碍了地层流体的垂向运移。

Based on 18 boxes of fossil specimens collected by the author from Xiaheyan, Zhongwei, Ningxia Hui Minority Autonomous Region and some other geological and palaeontological data from both Xiaheyan and the adjacent sections in the east sector of North Qilian Mountains, the present paper studies the botanical characteristics of Middel-Late Namurian Flora in Locality Xiaheyan and represents the primary reconstruction of the Middle-Late Namurian Flora in the Northeast Qilian Mountains, also tries to make available accounts for the correlation between the different Flora provinces, and discusses the origin time of Cathaysian Flora based on the succession and the transmissibility of the plants through the whole Namurian stage.

结合自从大学三年级一直到硕士研究生阶段笔者踏勘过的北祁连山东段地区十几条石炭系剖面，以及对相关文献的整理，笔者初步分析了北祁连山东段纳缪尔中晚期植物群的垂直演化分布情况，并完成了该期全球不同植物地理区系植物群植物学性质方面的简要比较。北祁连山东段地区纳缪尔早期与中晚期植物群的遗传性与继承性，加之华夏植物群的特征分子及一些东方型地方性分子在纳缪尔早期的出现，笔者认为这些无疑为晚古生代四大植物群之一的华夏植物群的起源完成于纳缪尔初期提供了有利证据。

Paleozoic stratum can be separated east and west stratigraphical areas, according to lithological character and palaeontological information, contacted relationships and diversification of stratigraphical units in horizontal and vertical etc. The stratums in west area can be divided Devonian-Carboniferous Nanduan formation and Permian Laba formation, which is passive continental margin-bathyal depositional sequences comprised argillaceous and detrital rocks, small siliceous and carbonatite in upper. The stratums in east area can be divided lower-middle Devonian Wenquan formation and middle-upper Devonian Manxin formation, upper Devonian-lower Carboniferous Pingzhang formation, Carboniferous-Permian Yutangzhai formation, middle Permian Damingshan formation, upper Permian Shifodong formation respectively, moreover, middle-upper Permian Huoju formation is exposed in Menglian area.

根据地层的岩石组合、古生物、接触关系和地层单位的纵横向变化等特征，晚古生代的地层明显的可分为东、西两个地层小区：东部地层小区从下至上可划为泥盆—石炭系南段组、二叠系拉巴组，为一套泥质岩、碎屑岩，上部夹硅质岩、碳酸盐岩建造，属被动大陆边缘斜坡—半深海沉积；西部地层小区由下至上划分为下—中泥盆统温泉组、中—上泥盆统曼信组、上泥盆—下石炭统平掌组、石炭—二叠系鱼塘寨组、中二叠统大名山组、上二叠统石佛洞组，此外，在孟连一带尚出露中—上二叠统火居组。

The Late Paleozoic volcanic rocks (from Early Devonian to Early Permian) were widely distributed in the south margin of the Altai Mountains.

阿尔泰山南缘晚古生代火山岩十分发育，从早泥盆世到早二叠世均有发育。

T. Van Richthofen writes in his "Letters" of the earliest times in the history of our earth, when probably the entire east and north Asia were under the sea.

T。 Van Richthofen &书信&中的一段会让我们对庐山的地质结构有所了解--在最远古地球上，整个亚洲的东部和北部还深藏于海底，经过一个漫长的古生代，才慢慢从海底浮出，在石灰纪后期，中国从海底延伸出来的地方变得很干燥，而沉淀在深海不同区域的白色矿床不断地伸出海面，再没有沉入海底，也没有任何证据表明中国的任何一座山曾在侏罗纪、白奎纪和第三纪再一次沉人海面。

The coal geological conditions in China, which is largely controlled by the plate tectonic evolution of Eastern Asia from Late Palaeozoic to present, are more complex than those of the United States, India, Australia, Germany, Canada, South Africa, as well as the Moscow outskirts coalfield in Russia and the Lublin coalfield in Poland.

受东亚晚古生代以来板块构造演化影响，我国煤田的地质条件，比美国、印度、澳大利亚、德国、南非、加拿大、俄罗斯近郊煤田和波兰卢布林煤田复杂得多。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。