chalk是什么意思

网络释义

用法例句

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。

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。

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。

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

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

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

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

cretaceous period [ system ]

【地质】白垩纪[系]

armored herbivorous dinosaurs of the Cretaceous.

白垩纪的有甲食草恐龙。

Jurassic-Cretaceous Boundary Strata in Southern Tibet;

西藏南部海相侏罗纪—白垩纪界线地层

Reconstruction of the Jurassic-Cretaceous Prototype Basin of Erlian Basin

二连盆地侏罗纪—白垩纪原型盆地恢复

The results show that the Cretaceous strata located in Sancha-Sidianwas deposited in late Cretaceous. At least, it contains late Cretaceous strata.

结果表明这一带的白垩系地层沉积于晚白垩纪 ,或至少含有晚白垩纪的沉积。

A GENERAL INTRODUCTION ON THE JURASSIC, CRETACEOUS AND EOGENE STRATA IN THE SHANGHAI AREA

上海地区侏罗纪、白垩纪及早第三纪地层简述

of or relating to the Cretaceous geologic era.

属于或关于地质上白垩纪的。

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。

genus of large duck-billed dinosaurs; late Cretaceous.

白垩纪晚期的一种大的鸭嘴龙。

genus of duck-billed dinosaurs of late Cretaceous.

白垩纪晚期的鸭嘴龙的一属。

enormous dinosaur of the middle Cretaceous found in Argentina.

白垩纪中期生活在阿根廷的巨大恐龙。

CRETACEOUS SANDSTONE BODIES AND SUBTLEHYDROCARBON POOLS IN SONGLIAO BASIN

松辽盆地白垩纪砂岩体与隐蔽油气藏

Characteristics of Cretaceous volcanics in the western depression of Liaohe fault depression

辽河断陷西部凹陷白垩纪火山岩特征

Middle Cretaceous abnormal geological events and global change

白垩纪中期异常地质事件与全球变化

The last dicynodont: An Australian Cretaceous relict.

白垩纪的最后的二齿兽[论文摘要]！！

Mechanisms and Simulations of Greenhouse Climate in the Cretaceous:A review

白垩纪温室气候机制的模拟研究评述

DIVISION AND CORRELATION OF JURASSIC AND CRETACEOUS STRATA IN SHANDONG

山东侏罗 - 白垩纪地层划分与对比

JURASSIC-CRETACEOUS NONMARINE GASTROPODS FROM NORTHERN XINJIANG

新疆北部侏罗、白垩纪非海相腹足类