查询词典 cretaceous

Any of numerous carnivorous dinosaurs of the Triassic to Cretaceous with short forelimbs that walked or ran on strong hind legs.

三叠纪至白垩纪的许多食肉恐龙，前肢短，靠其强壮的后肢走或跑。

These discoveries expand the known distribution of hadrosanr tracks from North America to China, and provide evidence for the existence of large hadrosaurs in the Cretaceous of the Nanxiong Basin.

这是中国鸭嘴龙足迹属的首次描述，将该足迹的分布从北美拓展至中国，并为南雄盆地存在大型的鸭嘴龙提供了新的化石证据。

The rare African amber also preserved bacteria, fungi, and plant remains from the Cretaceous period forest, such as this star-shaped hair from a fern species that sapped nutrients from the trees on which it grew.

罕见的非洲琥珀里还保存了来自白垩纪的细菌和植物残骸，例如这个蕨类植物的星状毛发，蕨类植物从其生长的树上获取营养物。

The ice raft and the glacier mud rock flow deposited along the northern and northwest edge of the plateau during early Cretaceous, implies that the northern edge of the plateau may be of the suitable height, may be similar to present＇s Himalaya Mountain.

该区中生代构造特征表明，该区侏罗纪和早白垩世的构造特点有着巨大的差异：侏罗纪，尤其是晚侏罗世末期以南北向的挤压构造为主，而早白垩世中期以后演变为以伸展构造为特征，古地理古环境明显改变。

The fossil record of tyrannosauroid theropods is marked by a substantial temporal and morphological gap between small-bodied, Barremian taxa, and extremely large-bodied taxa from the latest Cretaceous.

据悉，雄关龙化石的年代可追溯到白垩纪中期，它可能是&缺失的一环&，能够将我们熟悉的大型霸王龙与其体型较小的祖先联系起来。

The results show that the organic matter in the dark limestones of the lower Cretaceous is of medium abundance, good type and proper maturity. The limestones have hydrocarbon-generating potential.

研究结果表明，该盆地下白垩统暗色碳酸盐岩的有机质丰度中等、类型较好、成熟度适中，具备了形成油气的条件。

In order to deepen understanding in the MQZ at the northern continental margin of the South China Sea, this paper summarized three possible occurrences of the global MQZs originated from physical, chemical and structural processes, respectively, located at marginal zones and abyssal zones of the global oceans, mainly Jurassic MQZs both in the Atlantic and the western Pacific, Cretaceous MQZs in the northern Pacific, the Indian and in the Southern. Meanwhile, it is worth attaching importance to mantle plume activities in different scales, small magnetic sources induced by initially fragmented ridge oblique to the continental margin and faint magnetic lineations in those MQZs.

为了加深认识南海北部陆缘磁静区，归纳了全球深海和边缘两大类型磁静区的物理、化学及构造三大成因，主要包括大西洋和西太平洋侏罗纪磁静区，以及北太平洋、印度洋和南大洋白垩纪磁静区，强调磁静区与不同程度地幔柱活动、斜交扩张初始产生的小型错断磁源体及隐含弱磁条带关系的重要性。

They preyed on long-necked herbivorous dinosaurs on the indian subcontinent during the cretaceous period at the end of the dinosaur age, 65 million years ago.

他们以印度次大陆的食草恐龙为食，这种食草恐龙生活6500万年前的恐龙灭绝年代白垩纪。

The results show that: 1 the globally distributed CORBs were mainly present in late Cretaceous; 2the paleoenvironment of the CORBs is deep water of low latitude area in general; 3the lithologies are mainly consisted of red shale, red limestone, red marlstone, red mudstone and red siliciclastic shale; 4 the content of organic carbon is quite low.

通过对比，认为：1这些全球分布的大洋红层主要出现在晚白垩世，2一般分布在深水环境、低纬地区，3在岩性上，主要由红色页岩、红色灰岩、红色泥灰岩、红色泥岩、红色硅质页岩几种岩性组成，4有机碳含量普遍较低。

Marlstone samples from the Early Cretaceous Shangkuh Formation in the Jianzishan section and geological pits in Dawu＇ergen were analyzed systematically using the polarizing microscope, fluorescence microscope and freezing-heating stage.

利用偏光显微镜、荧光显微镜和冷热台对大乌尔根尖子山剖面和地质浅井早白垩世上库力组的泥灰岩样品进行了系统研究。

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。