地层

Among them,the chitinozoan succession in the Fenxiang Formation in West Hubei is the most complete Early Ordovician (Late Tremadocian to Early Arenigian) chitinozoan succession which have been not ever found in the world so far. The result on the precise subdivisions and corelations of the chitinozoan and graptolite and conodont biozone of Dawan Formation at Huanghuachang strongly supports the Huanghuachang section as the Global Stratotype Section and Point for the base of Middle Ordovician.

其中，有关在鄂西地区分乡页岩中所发现的连续保存的几丁虫序列是目前世界上早奥陶世晚特里马道克世-早阿伦尼克世最完整的几丁虫序列；宜昌黄花场奥陶系大湾组几丁虫、笔石和牙形石精细生物地层划分和对比的研究成果，为宜昌黄花场剖面最终竞争成为全球中奥陶统底界界线层型剖面和点奠定了坚实的基础。

In viewof geological records preserved from different regions of the world are not identical, its suggested that, whencorrelating the Ordovician-Silurian boundary, at the global boundary stratotype section, the FAD of N.persculptus be selected as the biomark, the transgression event identical to the FAD of N. persculptus as theauxiliary physical mark and the mass extinction and chemical anomaly events respectively as the auxiliarybiomark and chemomark. In some regions with few graptolite, the Ordovician-Silurian boundary should beindicated by the auxiliary marks, such as the transgression event, mass extinction or chemical anomaly event,with the other fossil such as conodont nearest to other geological events as the provincial biomark forcorrelation. In other regions with much stratigraphic hiatus originated from the regression, theOrdovician-Silurian boundary should he marked by the regression-transgression event nearly relevant to the N.persculptus Zone.

鉴于不同地区留下的地质记录不完全相同，奥陶／志留系界线对比方法不同：在界线层型剖面上，以N.persculptus的首现为生物标志，以与之基本一致的海侵事件为辅助的物理标志，以生物集群绝灭事件和化学异常事件为辅助的生物和化学标志；在笔石极不发育的地区，则以海侵事件、生物绝灭事件或化学异常事件为辅助标志，以与其相距最近、并且具有区域对比性的其它门类化石作为界线对比的生物标志；对于由于海退事件所造成地层缺失很多的地区，则以海退／海侵事件作为划分界线的物理标志，并以相映的海侵事件的开始作为奥陶／志留系的分界。

A integral equation formulation is derived based on modified Green's operator with norm less or equal to one.

利用范数小于或等于1的修正Green算子得到各向异性地层中的新积分方程，由于满足压缩映射条件，该积分方程在任意参数条件下总是迭代收敛的。

With relatively high total gold background values,the strata of the greenstone belt in western Shandong are source beds of gold deposit.

山东鲁西地区绿岩带地层总体金背景值较高，是金矿形成的矿源层。

Research and establishment of 3D digital strata grillage of basinPh.

盆地三维数字地层格架的建立与研究。

Key words:deep foundation pit; adjacent building; soft ground; influence rule

关键词］深基坑；邻近建筑物；软土地层；影响规律

It is a new topic that rule of ground movement in deep dip angle coal seam mining, the coal seam angle is one of important factor of deciding the rule of ground movement , the overlying rock of steep coal seam mining have different homogeneousness in horizontal orientation.

倾斜煤层是指煤层倾角在15°—55°之间的煤层，倾斜煤层开采地表沉陷移动规律是地表沉陷研究领域中的一个重要组成部分，煤系地层倾角是决定上覆岩层的移动和破坏形式及地表移动与变形程度的重要因素之一。

In some parts of the world, large amounts of hot water and steam come out of the ground at great speed.

在世界某些地区，会有大量热水和蒸汽快速溢出地表，那是因为地层深处存在着地下湖。

The cost and effect of grouting are directly related to grout's penetration radius and distribution shapes in the rock mass.

灌浆工程的成本和效果与灌入地层内的浆液的扩散范围和分布状态有着密切的关系。

But grout penetration in rock mass is influenced by many factors, the theoretical formula now available can only describe the effects of some single factor.

但浆液在地层内的运动受着多种因素的影响，现有的理论公式还只能对某些单因素的影响作出评价。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷