白垩系

Through statistical analysis of the rock mechanic properties of upper Jurassic and Cretaceous red mudstones, siltstones and sandstones in the middle Sichuan Red Basin, the range of their compressive strength, the features of the shearing strength and of the deformation curves are proposed in this paper.

文摘：对川中白垩系、侏罗系的泥岩、砂岩、泥质粉砂岩的抗压强度进行统计分析，得出红层岩石作为地基时抗压强度的范围值供设计参考，对泥岩、砂岩的其他力学性质进行了评价。

It is very clear that their different opinions are mainly caused by their different understanding of the nature, components and international correlation of the Jehol Biota, as well as the criteria of the Jurassic-Cretaceous boundary.

非常明显，产生不同观点的主要原因是我国专家对于热河生物群的性质、特征、组成和国际对比，以及侏罗－白垩系界线的定义和标准各自有着不同的认识和理解。

The phase of rift basin formed the primary source rocks and reservoir and seal. Triassic-Jurassic Pucara Group and Cretaceous Chonta Formation generated a mass of hydrocarbons in Paleocene-Eocene (60-45Ma) and Miocene (15-5Ma), respectively.

盆地内主要的烃源岩及储、盖组合均发育在裂谷盆地阶段，三叠系—侏罗系Pucara群和白垩系Chonta组2套主要烃源岩的排烃高峰期分别是古新世—始新世（距今60～45 Ma）和中新世（距今15～5 Ma）。

And Cretaceous in South Tibet was selected as the subject to investigate this relation in this article.

本文选择西藏南部白垩系为研究对象，对这一联系进行了针对性的研究。

According to different dimensions, the cretaceous groundwater basin can be divided into many groundwater flow systems.

摘要以不同的研究尺度，白垩系地下水盆地可以划分为若干地下水流系统。

The Ordos Cretaceous Groundwater Basin is an important energy basin of China, where water resource is of great value.

鄂尔多斯白垩系地下水盆地是中国重要的能源基地，水资源有着巨大价值。

Studies of the evolution and changes in the Tethys Ocean occurring during past 200 Ma may provide a model for fut...

在对藏南白垩纪沉积地质详细研究基础上，本文对尼泊尔喜马拉雅和Lhadkh喜马拉雅白垩系进行了对比。

The lithologic pool such as that developed in the actic region while the basin is rifting or in the glacis region while the basin is depressing all which can be found in this basin. Five kinds of sedimentary facies and thirteen sedimentary parfacies can be found in the Shengbei concave during the period of Jurassic series and Cretaceous series.

在该盆地内部既有可能发育断陷期陡坡带的岩性油气藏，又有可能发育坳陷期缓坡带的岩性油气藏，其胜北洼陷在中侏罗统－白垩系沉积时期主要发育5种陆相沉积相类型、10种沉积亚相类型。

According to the data of the core and dense well log, in this paper a high-resolution sequence stratigraphic correlation is made to the Saertu reservoirs of Member 2 and 3 of Cretaceous Yaojia Formation in the Yingtai oilfield of Songliao basin.

应用岩心、油田开发区密井网资料，对松辽盆地英台油田白垩系姚家组第二和第三段进行高分辨率层序地层对比，并对高频基准面旋回内单砂体的发育特征和空间展布规律进行研究。

Cf. D. apletopora. The results of microfossil analysis have demonstrated the occurrence of marine Jurassic and Cretaceous in the north of the South China Sea.

微体化石分析结果表明，南海北部珠江口盆地被首次揭露的前新生代地层中存在着海相的侏罗系和白垩系。

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。