1) chalk
[英][tʃɔ:k] [美][tʃɔk]
上白垩纪;白垩
2) upper cretaceous oils
上白垩纪油
3) cretaceous adj.
白垩的;白垩纪的
4) Cretaceous period
白垩纪
1.
According to the regional geology investigation, we found there are many magmatic activities in Cretaceous period; they are the Yanshan movement’s product, belonging to rift valley environment.
通过对其岩石特征、岩石化学、地球化学及侵入最新地层的研究和同位素测年结果,笔者认为该期侵入体形成于白垩纪,为燕山运动的产物。
2.
This paper deals with the present situation,prospect and significance of the research for continental Cre-taceous red beds to reconstruction of paleoclimate in the Cretaceous period.
介绍了白垩纪陆相红层研究的现状及前景,特别是其在白垩纪陆相古气候恢复方面所具有的重要意义。
3.
1%,and its average value during the Cretaceous period is about 0.
对藏南发育完整的、厚度巨大的海相白垩纪地层中的暗色泥、页岩开展了有机质丰度研究。
5) Cretaceous
[英][kri'teiʃəs] [美][krɪ'teʃəs]
白垩纪
1.
Preliminary Achievement of the Chinese Cretaceous Continental Scientific Drilling Project-SK-I;
中国白垩纪大陆科学钻探工程:松科一井科学钻探工程的实施与初步进展
2.
Structural Sub-Division and Depositional Systems of Lindian Fault Depression in the North Songliao Basin During Shahezi Stage of Early Cretaceous;
松辽盆地林甸断陷白垩纪沙河子期盆地次级构造单元与沉积体系
3.
An analysis of the dissipative structure of several Cretaceous major geological events;
白垩纪若干重大地质事件的耗散结构分析
6) pre-Cretaceous
前白垩纪
1.
The nature of the pre-Cretaceous "Tanlu fault zone" viewed in the light of basin-range coupling evolution on its both sides;
从郯庐断裂带两侧的“盆”“山”耦合演化看前白垩纪“郯庐断裂带”的性质
补充资料：上白
1.犹精白，极白。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条