strata GMAT

thin strata of air.

薄薄的空气层。

the lowest strata of the social pyramid.

金字塔形社会体系的最低层。

The older strata gradually disintegrate.

较老的岩层渐渐风化。

a complex poem with many strata of meaning.

一首含有多层意义的复杂的诗

Study shows that the T3-J1 radiolarian cherty strata will be made such a potential target in the not too distant future.

将此类地层列入勘探目标，研究认为此类地层将会成为一个潜的油气勘探目标。

Regional volcanic strata are the source of placer gold and laterization process is the main stage of formation of placer gold.

区域火山岩地层是砂金的矿源，地表赤红壤化可能是砂金形成的主要阶段。

Using preact grouting to strengthen and improve strata, the safe excavation in the loose stratum with silty sand was achieved.

采用超前注浆加固改良地层，实现了粉细砂松散地层的安全开挖；

The strata strike NE,and its rock association are consisted of pyroclastic sedimentary rock,micrite and pyroclastic rocks,and containts brachiopoda,coral,bryozoan.

时代属于中泥盆世早期,大体当于艾菲尔阶-吉维特阶,应归属为大民山组。

and for the high side wall with steep dip angle and obsequent rock strata, the deformation and collapse are caused by tension crack, break off and toppling.

而陡倾角、逆向岩层组合的高边墙则沿层面的张裂、折断、倾倒变形后的坍塌破坏为主。

So the similar simulation method is used in research on the instability mechanism and displacement rules of overlying magmata strata at the process of deep coal seam exploitation.

文似模拟实验为手段研究了深部煤层开采程中高位赋存的岩浆岩的运移机理,得出岩浆岩初次破断为固支梁的下位拉断非全厚破断,且破断后立即失稳;

Stress shell, which bears and pass load of overlying strata, is primary supporting body.The stress in skewback of stress shell forms abutment pressure of surrounding rock in vicinity of working face.

应力壳承但并传递上覆岩体荷载和压力，是最主要的承载体，应力壳拱脚处应力形成采场四周围岩支承压力。

Based on the geochemical data of the long regional profile in western Jiangxi and using quadratic arithmetic average and correlation analysis,orebearing features of strata are discussed in this paper.

本文赣西地区区域长剖面的地球化学测量数据为基础，运用二次算术平均及关分析方法，探讨了地层含矿性。

Wernerians thought strata were deposits from shrinking seas, but James Hutton proposed a self-maintaining infinite cycle, anticipating uniformitarianism.

沃纳里恩斯认为地层是收缩的海洋的沉积物，但詹姆斯•赫顿提出了一个自我维持的无限周期，促进了地质均变论的发展。

Coal-bearing strata belong to Middle-Lower Jurassic Series Jiangcang Formation,coal-forming environment was Mesozoic faulted basin fluviolacustrine,bog facies.

含煤地层为中下侏罗统江仓组,成煤环境属中生代断陷盆地内河湖、沼泽沉积。

The paper has discussed the sedimentary characteristics of primary coal-bearing strata in the region, These are the following, oolites, nodules, bedding, rock and mineral, paleontologic and coaly.

通对昌福山矿区主要含煤地层的沉积特征,即鲕粒、结核、层理、岩矿、古生物及煤质等分析,总结出昌福山矿区童子岩组第三段上亚段地层的沉积环境为:3号煤层为河控三角洲沉积;

The Coal Measures Strata are divided into 1 super-sequence and 3 sequences on the basis of paleostructure surface,widespread overlap unconformability,coal seam,and channel lag deposit.

根据古构造运动面、大面积超覆界面、煤层和河床滞留沉积将含煤岩系划分为1个超层序和3个层序。