silurian

简明释义

英[sai'ljuəriən;si-]美[sai'ljuəriən;si-]

adj. 志留纪的；希留利亚纪的

n. （地质）志留纪；希留利亚纪

英英释义

单词用法

同义词

反义词

例句

1.From the suture line towards the north, an andesite line along Sharburti Mountain was the volcanic island arc developed from middle Ordovician to middle-late Silurian.

由缝合线向北，沙尔布尔提山安山岩线是中奥陶世至中、晚志留世发育起来的火山岛弧。

2.No lithostratigraphic unit has been set up for the Silurian-Devonian strata in the vicinity of the Jinsha River, western Sichuan.

川西金沙江一带的志留—泥盆纪地层，前人没有建立岩石地层单位。

3.Vertically, 3sets of source rocks including the Lower Cambrian, the Middle-o-Upper Ordovician-Lower Silurian and the Permian were developed in Chinese Paleozoic Marine basins.

研究认为中国古生代海相盆地在纵向上主要发育下寒武统、中上奥陶统—下志留统和二叠系3套烃源岩。

4.There are also resemblances among Early Silurian rugose coral faunas of the Yangtze region, eastern Australia, and eastern North America to some extent.

扬子区早志留世珊瑚群与澳大利亚东部、北美东部同期珊瑚也有一定的相似性。

5.The uranium deposit of Silurian age in a certain area is controlled mainly by fracture and morphologically changing parts of uranium bearing siliceous limestone and chert beds.

某地区志留系中的铀矿床，主要受硅灰岩和硅岩含矿层形态变异部位和断裂构造控制。

6.Special Papers In Palaeontology, Number 83, Silurian Conodonts From The Yangtze Platform, South China ( )

古生物学论文，83，中国南方长江三角洲志留纪时期牙形刺研究。

7.The process of the oil migration is controlled by regional structures and the direction of the oil migration is consistent with the strike of major faults of Silurian.

油气运移过程受区域构造控制，运移方向与志留系主要断裂走向一致。

8.The earliest of the Big Five, the end-Ordovician or Ordovician-Silurian extinction events some 444 million years ago, are reckoned by many to be the second largest.

五次大灭绝中发生最早的一次是奥陶纪末期或者奥陶纪-志留纪大灭绝事件，发生在大约4亿4千4百万年前。许多科学家估计这次规模是五次当中第二大的。

9.Geologists study Silurian 志留纪 rock layers to understand ancient marine environments.

地质学家研究志留纪的岩层，以了解古代海洋环境。

10.The Silurian 志留纪 is known for significant evolutionary advancements in fish.

志留纪以鱼类的重要进化进展而闻名。

11.Many species of trilobites thrived during the Silurian 志留纪 era.

许多三叶虫种类在志留纪时代繁荣昌盛。

12.During the Silurian 志留纪, the first coral reefs began to form.

在志留纪期间，第一批珊瑚礁开始形成。

13.The fossils found in this region date back to the Silurian 志留纪 period.

在这个地区发现的化石可以追溯到志留纪时期。

作文

The geological time scale is a fascinating subject that helps us understand the history of our planet. Among the various periods that have shaped Earth, the Silurian period stands out for its significant developments in marine life and the emergence of early terrestrial ecosystems. Spanning from approximately 443 to 419 million years ago, the Silurian period follows the Ordovician and precedes the Devonian, marking a crucial transition in the Earth's biological and geological history. During this time, the planet underwent notable changes that would set the stage for the evolution of more complex life forms.One of the most remarkable features of the Silurian period is the proliferation of marine organisms. The oceans were teeming with life, including diverse species of fish, corals, and mollusks. The development of jawed fish during this era is particularly noteworthy, as it represents a significant advancement in vertebrate evolution. These early fish laid the groundwork for the vast array of aquatic life we see today. Additionally, the Silurian seas were home to various types of coral reefs, which provided habitats for numerous marine species and contributed to the overall biodiversity of the time.As the Silurian period progressed, life began to venture onto land. This era witnessed the emergence of the first vascular plants, which played a critical role in transforming terrestrial environments. The ability of these plants to transport water and nutrients allowed them to thrive in previously inhospitable areas. The colonization of land by plants not only changed the landscape but also had profound implications for the atmosphere and soil formation. As plants photosynthesized, they contributed to the increase of oxygen levels, creating a more hospitable environment for future terrestrial life.In addition to the advancements in flora, the Silurian period also saw the rise of early terrestrial arthropods. These creatures, which include ancestors of modern insects and spiders, began to exploit the new habitats created by the colonization of land by plants. The interaction between these early plants and arthropods laid the foundation for complex ecosystems that would evolve over millions of years.The Silurian period was not without its challenges. The Earth experienced fluctuations in climate and sea levels, leading to periods of both expansion and contraction of marine habitats. These environmental changes influenced the distribution and diversity of life forms, driving evolutionary adaptations that would be essential for survival in varying conditions.In conclusion, the Silurian period was a pivotal time in Earth's history, characterized by significant advancements in marine life and the initial colonization of land by plants and arthropods. Understanding this period helps us appreciate the intricate tapestry of life that has evolved over millions of years. The legacy of the Silurian continues to resonate today, as the foundations laid during this time have paved the way for the rich biodiversity we observe in our world. By studying the past, we can gain valuable insights into the processes that have shaped life on Earth and the interconnectedness of all living organisms.

地质时间尺度是一个迷人的主题，它帮助我们理解我们星球的历史。在塑造地球的各种时期中，志留纪时期因其海洋生物的重大进展和早期陆地生态系统的出现而引人注目。志留纪时期大约从4.43亿年前到4.19亿年前，位于奥陶纪之后，泥盆纪之前，标志着地球生物和地质历史中的一个关键过渡。在这一时期，地球经历了显著变化，为更复杂生命形式的演化奠定了基础。志留纪时期最显著的特征之一是海洋生物的繁荣。海洋中充满了生命，包括各种鱼类、珊瑚和软体动物。该时代的有颌鱼的发展尤其值得注意，因为它代表了脊椎动物进化的重要进步。这些早期的鱼为我们今天所见的丰富水生生命奠定了基础。此外，志留纪海洋是各种珊瑚礁的家园，这些珊瑚礁为众多海洋物种提供栖息地，并促进了当时的整体生物多样性。随着志留纪时期的推进，生命开始进军陆地。这个时代见证了第一批维管植物的出现，这些植物在改变陆地环境方面发挥了关键作用。这些植物能够运输水分和养分，使它们能够在以前不适合生存的地区茁壮成长。植物对土地的殖民不仅改变了景观，还对大气和土壤形成产生了深远的影响。随着植物进行光合作用，它们促进了氧气水平的增加，创造了一个更适合未来陆地生命的环境。除了植物的进展，志留纪时期还看到了早期陆地节肢动物的崛起。这些生物包括现代昆虫和蜘蛛的祖先，开始利用植物殖民陆地所创造的新栖息地。早期植物与节肢动物之间的相互作用为数百万年后演变出的复杂生态系统奠定了基础。志留纪时期并非没有挑战。地球经历了气候和海平面的波动，导致海洋栖息地的扩张和收缩。这些环境变化影响了生命形式的分布和多样性，推动了生存所必需的进化适应。总之，志留纪时期是地球历史上的一个重要时期，以海洋生命的重大进展和植物及节肢动物初步殖民陆地为特征。理解这一时期有助于我们欣赏数百万年来演变而成的复杂生命织锦。志留纪的遗产至今仍在共鸣，因为这一时期奠定的基础为我们观察到的丰富生物多样性铺平了道路。通过研究过去，我们可以获得有关塑造地球生命的过程和所有生物之间相互联系的宝贵见解。