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- Ordovician strata in Tahe oilfield belong to carbonate reservoir with well developed fractures and dissolution pores. 塔河油田奥陶系碳酸盐岩储集层裂缝普遍较发育，同时存在大量溶蚀孔隙。
- In this paper, the straticulate dolostone and spatulate dolostone in Lower Ordovician strata of Well Tazhong 1 were studied using petrologic and geochemical methods. 本文选择塔中地区塔中1井下奥陶统藻纹层白云岩与夹层竹叶状白云岩作为对象,应用岩石学与地球化学方法对其成因问题进行了研究。
- Two periods of high-pressure metamorphic belts, which have been dated 335.5 Ma and 440-460 Ma seperately by isotopic methods, have been discovered in the mid Cambrian and low-middle Ordovician strata. 同位素年龄分别为335.;5 Ma和440-460 Ma的两期高压变质带赋存于中寒武统和下中奥陶统中。
- Tazhong 45 reservoir, lying in the Middle-Upper Ordovician strata of Tazhong area, is a fluoritized carbonate reservoir.There exist many fluorite veins filled with crude oils in its reservoir bed. 摘要塔中45井油藏是位于塔中地区中上奥陶统碳酸盐岩地层中的一个油藏，其储层中发现有大量的被原油充填的萤石脉。
- According to evolutionary periods of paleokarst, three maps are drawn: Ordovician stratum thickness map, Pre-carboniferous karst landform and Ordovician top structure maps of Ordos Basin. 根据古岩溶的演化期次，分别编制了奥陶系地层厚度图、前石炭纪岩溶古地貌图及奥陶系顶面构造图。
- CORRELATION AND ANALYSIS OF THE ORDOVICIAN STRATA AT THE SOUTH MARGIN OF THE ORDOS BASIN 鄂尔多斯南缘奥陶纪地层对比分析
- Study on Outcrop Sequence Stratigraphy of the Lower-Middle Ordovician Strata in Keping Tarim Basin 塔里木盆地柯坪地区中下奥陶统碳酸盐岩露头层序地层学研究
- Ordovician strata 奥陶系
- We can follow the history of life through the strata. 我们可以通过这一层层的地层跟踪生命的历史。
- Early Ordovician strata 早奥陶世地层
- They represent each society stratum. 他们代表各个社会阶层。
- The older strata gradually disintegrate. 较老的岩层渐渐风化。
- The older strata gradually disintegrated. 年代较久的地层逐渐崩解了。
- Lowstand bottom fan in upper Ordovician series. . 上奥陶统低水位期盆底扇体；
- They do not constitute a separate class or stratum. 知识分子和青年学生并不是一个阶级或阶层。
- These strata, lying apparently in contact, are in fact abysmally separated. 这些表面上相触的地层实际上相隔很远。
- To expose(rock strata)by erosion. 剥蚀因腐蚀而露出（石层）
- He hates the privileged stratum. 他憎恨特权阶层。
- Marine volcanics of Early Ordovician was found in Zhifang region. 摘要纸房地区具有早奥陶世海相火山岩存在。
- They belong to the rich strata and never work. 他们属于富裕阶层，不干活。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
