Boundary clay layers are used by scientists to determine the rate at which an extinct species declined.
边界粘土层被科学家用来确定一个灭绝物种衰落的速度。
Other reliable evidence suggests that the deposition of the boundary clay could not have taken one million years.
其他可靠的证据表明，边界粘土的沉积不可能需要100万年。
However, other reliable evidence suggests that the deposition of the boundary clay could not have taken one million years.
然而其他可靠的证据则表明沉积这层粘土可能不需要一百万年。
By measuring how many of these meteorites fall to Earth over a given period of time, scientists can estimate how long it might have taken to deposit the observed amount of Ir in the boundary clay.
通过确定在一段给定时间内掉落在地球上的这种陨石的数量，科学家们就可以确定沉积隔层粘土的形成时间。
The moving boundary is introduced to indicate the notable change in the clay retardation factor with the increase of solute concentration.
模型引入了移动边界以说明当溶质在粘土孔隙水中的浓度达到某一较高值后，阻滞因子将发生显著变化。
The finite deformation theory is applied to investigate the effects of boundary condition and loading speed on shear band localization of normally consolidated Fujinomori clay.
基于有限变形理论，研究了正常固结藤森黏土的边界约束效应和加载速度效应。
The available solutions without considering the consolidation and creep of clay, the permeable and impermeable boundary of tunnel are just extreme cases of this paper.
现有不考虑土体固结和流变、且简单假定隧道边界透水或不透水情况下的解均为此解的特例。
In this paper, the consolidation problem of soft clay ground improved by granular columns considering boundary permeability is studied and the corresponding analytical solution is developed.
文章研究了考虑边界透水性的散体材料桩复合地基固结问题，给出了相应的解析解。
And the boundary of them has the same lithologic character: the ravinement surface of river course or exposure mudstone of flooding plain and root clay.
二者的界面是相同的，均为河道砂体底部的冲刷侵蚀面或者是暴露过泛滥平原泥岩、根土岩等。
We also discover the Lower Quaternary limit locates in M/G boundary or the interface between the grey-green clay-silty sand layer and brown-red silty clay sand layer.
研究表明第四纪下界存在于该剖面的灰绿色粘土粉砂质砂层与红褐色粉砂粘土质砂层之间（即M／G面上）。
We also discover the Lower Quaternary limit locates in M/G boundary or the interface between the grey-green clay-silty sand layer and brown-red silty clay sand layer.
研究表明第四纪下界存在于该剖面的灰绿色粘土粉砂质砂层与红褐色粉砂粘土质砂层之间（即M／G面上）。
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