查询词典 cretaceous

During the Early Cretaceous period, southern England was a low-lying, richly vegetated river floodplain.

在白垩纪早期，英格兰南部是一个低地，生长着丰富的河漫滩。

However, this is an ordinary piece of chalk, the process of making some quite complicated, and made a first Cretaceous limestone, chalk and then add water, stirring, stirring evenly, and then poured into the model so that it solidified, it can be made of a pieces of chalk.

但是，就是一支如此普通的粉笔，制作的过程倒也有些繁琐，得先将石灰岩制成白垩，再将白垩加水搅拌，搅拌均匀后，再倒入模型中使其凝固，这样才能够制成一支粉笔。

From the view of stratigraphy, they all belong to the Cretaceous period

从地层学上看，它们都属于白垩纪。

This model implies that the HP rocks on opposing sides of the Motagua fault evolved along a plate boundary that underwent both dip slip and strike slip motion throughout the Late Cretaceous as a result of oblique convergence.

这种模式意味着对莫塔瓜故障敌对双方惠普岩石沿板块边界的经历都倾滑和走滑运动在整个晚白垩世的转变，作为一个斜融合的结果。

This implies a major stage of crustal growth in Proterozoic time and remelting of the crustal material in Early Jurassic time;(5) The Oligocene-Miocene adakites contain magmatic zircons that show similar Hf isotope compositions to the Cretaceous-Paleogene Gangdese batholiths, providing a key constraint that allows evaluation of the nature and timing of crustal thickening in southern Tibet owing to the India-Asia collision; and (6) As a whole, the Hf isotope information observed in zircons from the above Transhimalayan rocks demonstrates a temporal variation in εHf values, and thus TDMC ages, that suggests multiple stages of orogenic or crustal formation events.

五、渐新世、中新世的埃达克岩，其岩浆锆石的铪同位素特徵与白垩纪、古第三纪冈底斯岩浆相似，因而为藏南在印亚碰撞以后，地壳增厚的时间与机制提供了关键性的制约；六、综观上述藏南火成岩中的锆石，它们与时变化的铪同位素初始值及其对应的模式年龄记录了拉萨地块多阶段的造山与地壳形成历史。

They expected to find evidence of well-known Late Cretaceous vegetation such as conifers and cycads.

他们原本期望发现晚白垩世时期著名植物如针叶树和苏铁存在的证据。

The dominant vegetation on land in the early Cretaceous was forests of cycads, conifers, gingkgoes and ferns.

在白垩纪早期陆地上占统治地位的植被是苏铁，针叶树，银杏和蕨类。

The observations and measures on many faults in the Tertiary as well as in the Cretaceous rocks in the Kuqa Depression, Tarim Basin, could help us to reconstruct Late Tertiary tectonic paleostress field by inversing a lot of fault-slip data.

基于对库车坳陷内第三系和同时卷入变形的白垩系中发育断层的野外观测，采用断层滑动数据反演方法，对库车坳陷的第三纪构造古应力进行恢复。

These simulations focused on the major factors driving Cretaceous climate changes and the critical time periods of the climate change, and tested the internal and external forcing in the earth climate system and the feedback effects among various spheres of the earth system, thus providing us an understanding of the mechanism of greenhouse climate and an important scientific basis for projection of the future climate changes.

这些古气候模拟试验锁定在气候变化的关键时段和驱动因子、测试地球内外动力和地球各圈层反馈作用，可为认识温室气候的成因、探讨气候变化内在机制和预测未来气候提供重要的科学依据。

A large carnivorous dinosaur of the Upper Cretaceous Period of North America, characterized by small forelimbs and a large head .

霸王龙上白垩纪北美洲的一种大型食肉恐龙，前肢小且头大

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。