Precambrian

1. The problem with ascribing all tillites to glaciation, however, is that tillite deposits are widespread in Precambrian sediments.: 然而，使所有的黑土形成冰川作用的问题是，在前寒武纪沉积物中广泛分布有黑土。

2. Although named after a site in Australia, the Ediacaran formation is worldwide in distribution and dates to Precambrian times.: 尽管伊迪卡拉是以澳大利亚的一处地名而命名，但伊迪卡拉沉积层却遍及世界各地，并且可追溯到前寒武纪时代。

3. They are Precambrian rocks.: 它们是前寒武纪岩石。

4. Precambrian animals must therefore have lived at such depths.: 因此，前寒武纪的动物肯定曾经生活在这么深的地方。

5. The Precambrian stratigraphic unit has been found and mapped.: 发现并填绘出前寒武纪地层单元。

6. Precambrian metamorphic rocks constituted the basin basement.: 盆地的基底是前寒武系变质岩。

7. Gneiss, a metamorphic rock, can be commonly found in Precambrian areas.: 片麻岩，变质岩，可以发现，在常见的前寒武纪地区。

8. They are important structural features in the Precambrian metamorphic rocks.: 它是前寒武纪变质岩内一种重要的构造现象。

9. These findings are not of Precambrian animals themselves, but of their tracks.: 发现的并不是前寒武纪的动物本身，而是它们的足迹。

10. S.Haldane, a pioneering British geneticist, replied: “Fossil rabbits in the Precambrian era.: 霍尔丹，英国遗传学的先驱，他回答道：在前寒武纪的兔子化石就是了。

11. Early - Precambrian rocks are widely exposed in Dunhuang - Beishan area, GansuProvince.: 甘肃敦煌-北山地区广泛出露早前寒武纪岩石。

12. Among them the precambrian and cenozoic eras are the main metallogenic epoches in the world.: 就全球而言，前寒武纪和新生代是金矿的重要成矿期。

13. Two main glacial epochs affected both areas during the last 100 million years of Precambrian times.: 在前寒武纪的最后1亿年中，两个主要的冰川时期对两个地区都产生了影响。

14. That history began with the origin of the primitive, unicellular aquatic algae of the Precambrian Eon.: 最初，前寒武纪出现原始的单细胞水生藻类，除了蓝绿藻和细菌之外。

15. The first three eons, which together lasted nearly 4 billion years, are together known as the Precambrian.: 前三个时期合起来持续了40亿年，合称为前寒武纪（隐生宙）。

16. Precambrian rocks are described as "basement rocks" because they are usually buried deep under the surface.: 前寒武纪岩石被称为基岩，因为它们通常深埋于地表之下。

17. Driving to work through the rugged Precambrian Shield northeast of Winnipeg, he collided with an enormous moose.: 开车去上班，通过崎岖的东北前寒武纪盾温尼伯，他撞上了巨大的驼鹿。

18. All the evidences indicate Miyi Precambrian metamorphic rock series is a typical low pressure metamorphic terrain.: 所有的证据表明该变质地体是一个典型的前寒武纪低压型前进变质地体。

19. Structure-stratigraphic method is an effective method for stratigraphic study in Precambrian metamorphic rock area.: 构造地层学方法是变质岩，尤其是前寒武纪变质岩地区地层研究的有效方法。

20. The Liaoji Paleoproterozoic fold zone is an important fold-orogenic and metallogenic zone in the early Precambrian.: 辽吉古元古宙褶皱带是早前寒武纪时期的一条重要的褶皱造山带与成矿带。

21. It is thought that the original crust, especially the metamorphose basement of Precambrian is the base of gold-ore formation.: 初始地壳，尤其是前寒武纪的变质基底是金矿密集区形成的物质基础。

22. The rocks coexist closely, distributing in a narrow and long belt in the Late Precambrian orogenic belt in northern Liaoning.: 它们紧密共生，呈狭长的带状分布于辽宁北部晚前寒武纪造山带内。

23. The many achievements in the study on. the fossils (in especial megafossils) of late Precambrian - Cambrian in China are outlined.: 概述了中国在晚前寒武纪——寒武纪生物化石群研究多方面（尤其是大化石）的主要成就。

24. This study supplies new geological data for research of the early Precambrian crust growth and tectonic evolution of Western Kunlun.: 这对研究西昆仑山早前寒武纪陆壳增生及构造演化提供了重要的地质资料。

25. The Hengshan high-grade metamorphic terrain is one of the typical areas for the study of Early Precambrian metamorphic rocks in China.: 恒山高级变质岩区是中国早前寒武纪变质岩研究的经典地区之一。

26. The above-mentioned results are of significance for further study of Precambrian structures and magmatic evolution in Fujian Province.: 这一最新成果对进一步研究我省前寒武纪构造及岩浆演化具有重要意义。

27. The existence of the undeformed and unmetamorphed Precambrian dike swarms shows that the Precambrian North China Craton had been a rigid plate.: 未变形未变质的前寒武纪岩墙群的存在表明前寒武纪华北克拉通已经具有了刚性板块的性质。

28. Stromatolite and molar-tooth structures are two kinds of peculiar Precambrian sedimentary phenomena, attracting great attention from geologists.: 叠层石和臼齿构造是前寒武纪较为引人注目的两种沉积现象。

29. Of, belonging to, or being the later of two pisions of Precambrian time, during which sponges, sea worms, and other forms of sea life appeared.: 原生代的，元古代的前寒武纪两个时期中的后一个时期的，属于这个时期的，在这个时期的在这个时期海绵、海洋蠕虫和其它形式的海洋生命出现。

30. Z-shaped superposed folds formed by nearly vertical gneiss and feldspar-quartz veins are widely developed in East Qinling Precambrian metamorphic rocks.: 在东秦岭前寒武系变质岩中，发育了许多Z字型叠加褶皱。它们是由近直立的片麻岩和长英质脉形成的。

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