oligocene

简明释义

英[ɒˈlɪɡəʊˌsiːn]美[ˈɑlɪɡoˌsin]

adj. 渐新世的；形成于在渐新世的；渐新统的

n. 渐新世；渐新统；渐新世岩石系列

英英释义

单词用法

同义词

反义词

例句

1.The high relative abundance of the fossil planktonic algae indicates the high primary surface productivity of the palaeo-lake within the Oligocene.

文昌组浮游藻类相对丰度高，表明始新世珠江口古湖的表层水初始生产力高。

2.The massive changes of the kinematic pattern occurred roughly between the Eocene and Oligocene epochs, which is in accordance with the great reorganization in global kinematics and dynamics.

运动学模式发生巨大转变的时期，大致在始新世与渐新世之间，这与全球运动学和动力学发生的重大改组的时间相一致。

3.This study notes that no reliable Late Oligocene to Miocene nannofossil markers were found in these 2 crusts. Furthermore, sedimentation hiatus was observed.

研究注意到在2个结壳中都没有发现可信的晚渐新世到中新世的化石记录，在个别层位之间存在着沉积间断。

4.The differences between Oligocene series in the east and west are demonstrated.

指出了盆地东部和西部渐新统存在的差异。

5.The oil shale mainly occurs in the Eocene-Oligocene Youganwo Formation.

油页岩主要赋存于始新渐新统油柑窝组。

6.Late Oligocene and the Ulunguhe Fm. Early Eocene to Early Oligocene.

乌伦古河组——早始新世至早渐新世。

7.The primary section of the formation is unfossiliferous. It remains uncertain whether its geological age is Eocene or Oligocene.

本文证实它是西露天组的一部分，是西露天组上部地层的相变，其时代应和西露天组相同。

8.The rocks found in this region date back to the Oligocene 渐新世, providing valuable insights into ancient environments.

该地区发现的岩石可以追溯到渐新世 Oligocene，为古代环境提供了宝贵的见解。

9.During the Oligocene 渐新世, many modern mammal families began to emerge.

在渐新世 Oligocene期间，许多现代哺乳动物家族开始出现。

10.Fossils from the Oligocene 渐新世 are crucial for understanding the evolution of marine life.

来自渐新世 Oligocene的化石对理解海洋生命的演化至关重要。

11.The climate during the Oligocene 渐新世 was significantly different from today, with cooler temperatures.

在渐新世 Oligocene期间，气候与今天有显著不同，温度较低。

12.Geologists often study Oligocene 渐新世 deposits to learn about past tectonic movements.

地质学家常常研究渐新世 Oligocene沉积物，以了解过去的构造运动。

作文

The term Oligocene refers to a significant geological epoch that lasted from approximately 34 million to 23 million years ago. It is part of the larger Cenozoic Era, which is often referred to as the 'Age of Mammals' due to the prominence of mammals during this time. The Oligocene is particularly interesting because it marks a period of major evolutionary changes and climatic shifts that had lasting impacts on the planet's biodiversity. During the Oligocene, the Earth experienced a cooling trend, leading to the development of grasslands and savannas, which in turn influenced the evolution of various species. This epoch saw the rise of many modern families of mammals and birds, as well as the extinction of some prehistoric species that could not adapt to the changing environment. One of the most notable features of the Oligocene is the diversification of mammals. As the climate became cooler and drier, many mammals began to adapt to these new conditions. For instance, the ancestors of horses, rhinoceroses, and elephants began to emerge during this time. These adaptations were crucial for survival in the increasingly open landscapes that characterized the Oligocene. Additionally, marine life also underwent significant changes; for example, the first true whales appeared during this epoch, showcasing the incredible adaptability of life on Earth. The Oligocene also played a vital role in shaping the Earth's geography. The collision of tectonic plates led to the uplift of mountain ranges such as the Himalayas, which further influenced climate patterns and the distribution of species. This geological activity created new habitats and ecological niches, allowing for even more diversification of life forms. Fossil evidence from the Oligocene provides valuable insights into the flora and fauna of the time, helping scientists piece together the evolutionary history of many species. In conclusion, the Oligocene is a fascinating epoch that serves as a crucial chapter in the story of life on Earth. Its significance lies not only in the evolutionary advancements that occurred but also in the environmental changes that shaped the planet's ecosystems. Understanding the Oligocene helps us appreciate the complexities of our natural world and the intricate relationships between organisms and their environments. As we continue to study this period, we gain a deeper understanding of how past climates and biological developments can inform our knowledge of current and future ecological challenges. The legacy of the Oligocene is evident in the rich tapestry of life we see today, reminding us of the dynamic processes that have shaped our planet over millions of years.

术语渐新世指的是一个重要的地质时期，大约持续了3400万到2300万年前。它是更大新生代的一部分，通常被称为“哺乳动物的时代”，因为在这一时期，哺乳动物变得非常突出。渐新世特别有趣，因为它标志着重大的进化变化和气候变化，这些变化对地球的生物多样性产生了持久的影响。在渐新世期间，地球经历了一次降温趋势，导致草原和稀树草原的发展，从而影响了各种物种的进化。这个时期见证了许多现代哺乳动物和鸟类家族的崛起，以及一些无法适应环境变化的史前物种的灭绝。 渐新世最显著的特点之一是哺乳动物的多样化。随着气候变得更加寒冷和干燥，许多哺乳动物开始适应这些新条件。例如，马、犀牛和大象的祖先在这一时期开始出现。这些适应对于在日益开放的景观中生存至关重要。此外，海洋生物也经历了显著变化；例如，真正的鲸鱼在这个时期出现，展示了地球上生命的惊人适应能力。 渐新世还在塑造地球地理方面发挥了重要作用。构造板块的碰撞导致了喜马拉雅山脉等山脉的隆起，这进一步影响了气候模式和物种的分布。这种地质活动创造了新的栖息地和生态位，使生命形式的多样化得以进一步发展。从渐新世的化石证据提供了对当时植物和动物的宝贵见解，帮助科学家拼凑出许多物种的进化历史。 总之，渐新世是一个迷人的时期，它是地球生命故事中的重要篇章。其重要性不仅在于发生的进化进展，还在于塑造地球生态系统的环境变化。理解渐新世有助于我们欣赏自然世界的复杂性以及生物与环境之间错综复杂的关系。随着我们继续研究这一时期，我们对过去气候和生物发展如何影响我们对当前和未来生态挑战的认识有了更深刻的理解。渐新世的遗产在我们今天看到的丰富生命织锦中显而易见，提醒我们数百万年来塑造我们星球的动态过程。