地层

With the thesis and research content above,we make the systemic stratigraphic division and correlation for each section of Majiagou group in research area with the conodont combination and its zoning features、division of international Ordovician and the partition method before.

从研究区的实际出发，结合牙形剌古生物组合面貌及分带特征，对研究区奥陶系马家沟组各段地层进行了系统对比厘定。

The conodont study indicates that the thick carbonate rock strata belongs to the Majiagou Formation of the Middle Ordovician. The Upper part of the formation has the conodont fossil Erraticodon tangshanensis, the lower part is represented by Tangshanodus tangshanensis.

牙形石研究表明这套厚层质纯的碳酸盐岩地层属于中奥陶统的马家沟组，含有上部以Erraticodon tangshanensis为主，下部以Tangshanodus tangshanensis为特征的牙形石。

However,according to the stratigraphic sequence,petrology and conodont revised by An T.X.,the formation may be not the Silurian,while it is the Middle Ordovician correlated to the Badou Member of Fengfeng Formation in North China or partial Yuexian Formation.

李河荣等根据牙形刺将朝鲜半岛太白山盆地的桧洞里组划归志留系，但是从层序、岩石和安太庠修定的牙形刺化石来看，桧洞里组可能不是志留系，而是与中朝地台华北区峰峰组八陡段可比的中奥陶世地层。

In view of geological records preserved from different regions of the world are not identical, it's suggested that, when correlating 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 the auxiliary physical mark and the mass extinction and chemical anomaly events respectively as the auxiliary biomark and chemomark. In some regions with few graptolite, the Ordovician-Silurian boundary should be indicated 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 for correlation. In other regions with much stratigraphic hiatus originated from the regression, the Ordovician-Silurian boundary should be 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。

He tried to guess how the strata behaved at the time the contortions formed.

他试图推断地层在扭曲形成时是如何变化的。

A integral equation formulation is derived based on modified Green's operator with norm less or equal to one. The integral equation is convergent for any conductivity distribution and frequency if iterative solvers are used.

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。

The production of Corbicula fluminea has been decreasing in recent years. The most difficult problem for farming Corbicula fluminea is lack of enough freshwater, due to the water pollution in Taiwan.

台湾蚬养殖产量并没有年年增加，反而有所减少，主要是由於淡水资源的污染，以及超抽地下水导致地层下陷的影响，使得淡水资源的取得不易。

With the abasing of the stratum static load, the bulk of the core sample come into expansion.

钻井岩样由于地层静压力的降低而导致总体积发生膨胀。

Sediment cores as a traditional and primary instrument for studying the sedimentary environments and depositional processes of tidal flat are taken generally by gravity corer in inter-tidal flat.

有关潮滩盐沼系统沉积和地貌演化过程的研究已有许多学者利用不同手段进行了研究，如通过采集柱状样分析地层中的沉积记录[2~3]、现场的多年观测研究[4]、数学模拟等[5]等。

Global correlation for strontium isotope curve in the Late Cretaceous of Tibet and dating marine sediments.

西藏晚白垩世锶同位素曲线的全球对比及海相地层的定年。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。