查询词典 glaciations

For example, an early classification of Alpine glaciation suggested the existence there of four glaciations, named the Gunz, Mindel, Riss, and Wurm.

比如，一个较早关于阿尔卑斯冰川的划分方案就提出了四个冰川期，分别是Gunz， Mindel， Riss， and Wurm。

With the progress of the theory and methodology of Cosmogenic surface exposure dating, the technique has been widely used in studies of Quaternary glaciations, impact craters, volcanic surfaces, and fault faces.

宇宙成因核素地表暴露测年技术的理论和方法日臻完善，目前它已被广泛到第四纪冰川、撞击坑、火山地貌、断层面等地学问题中来。

It is nothing else than impurities prenatal inherent in ore that seriously affect the quality of the latter, which is formed as a result of geological vicissitudes including diastrophic movement, eruption of volcano, sedimentation, glaciations and weathering etc.

没有什么比矿石中含有的天然杂质更能影响矿石的品质了，这些矿石是由地质的变迁引起的，包括地壳运动，火山爆发，沉淀，冰河作用，风化作用等等。

Researchers used the features of glacial erosional and sedimentary landforms as well as the differences of the glacial tills in chemical and physical weathering to determine the ages of Quaternary glaciations .

1引言20世纪70年代及其以前，我国第四纪冰川的年代主要是采用相对年代法确定，即采用冰川侵蚀地貌和沉积地貌，冰碛物化学和物理风化程度差异来划分第四纪冰期[1~3]。

The contrasting isotope data between 850 Myr ago and the Neoproterozoic suggest that the terrestrial expansion of photosynthesizing communities preceded the significant climate perturbations of the late Precambrian glaciations, and was followed by a rise of O2 ref.

对比850百万年前和新元古代的同位素数据表明陆地光合作用群落生物的爆发应当先于晚前寒武纪冰川作用的气候变动。

These ice ages are also called glaciations and the periods of relative warmth between them are called interglacials.

这些冰期也叫冰河期，在各冰期间的相对温暖时期就叫间冰期。

Successive glaciations tend to distort and erase the geological evidence, making it difficult to interpret.

历任冰川往往歪曲和抹杀地质证据，难以解释。

There were five Quaternary glaciations in the Halasi River Catchment according to the remains of Quaternary glaciations and C〓 dating.

根据第四纪冰川遗迹和〓测年，哈纳斯河流域存在五次明显的冰期，其中更新世存在三次冰期。

5Ma. 2 No remnants of glaciations are found on the soil sites of Mount Harding, which suggests that the Antarctic glaciations have not reached the soil sites since at least 0.5Ma, and the ice cap was not much higher than present, even during the Last Glacial Maximum.

水分高，Na〓含量高；无水分，Mg〓含量高，Na〓的含量则很低；K〓和Ca〓的含量与土壤的水分关系不大，在土壤剖面中分布稳定，变化趋势不明显。

Several main results on the evolutions of the life and environment on early earth are summarized as follows:(1) the oxygenation of surface environment didn''t cease until a stable stage for 0.4Ga appeared after 1.6Ga;(2) compared to the isotopic compositions of kerogens and coexisted carbonates, the differences between two can effectively carrier the signals from local environments and bio-assemblages;(3) multiple isotopic relationships between kerogens and individual alkanes in Proterozoic samples were observed, which would depend on the specific biogeochemical processes;(4) repeated biogeochemical changes were observed accompanying Neoproerozoic glaciations, which suggesting that environmental rather than evolutionary forces were driving the biogeochemical changes;(5) the bio-radiations after Neoproterozoic glaciations were definitely suggested by molecular and isotopic data to be at the early Cambrian and after the middle of Doushantuo deposition with different triggers for them.

研究获得以下重要认识：（1）古元古代地表环境的氧化可能一直持续到中元古代早期(约1.6Ga)，而在此之后的4亿年里则保持相对稳定；（2）相对于传统的干酪根和碳酸盐的碳同位素组成，二者之差则能更好反映区域环境的演化特征；（3）在元古代干酪根与单体烷烃类之间存在多种碳同位素组成关系；而其与不同的生物地球化学过程有关；（4）全球海洋生物地球化学特征随新元古代多次冰期出现循环波动，这显然为环境因子的驱动；（5）在新元古代大冰期之后，分子与同位素数据显示地球生命在陡山沱中后期和早前寒武纪出现两次大辐射，然而两次生命辐射的本质却是不同的。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。