sedimentary

简明释义

英[ˌsedɪˈmentri]美[ˌsedɪˈmentri]

adj. 由沉淀物形成的，沉积而成的

英英释义

单词用法

同义词

反义词

例句

1.They are sedimentary rocks, rocks which were laid down by the action of water on the bed of the ocean.

它们是水成岩，是由海水作用沉至海底的。

2.Sedimentary rocks such as sandstone also testify to the quicker days of yore.

诸如砂岩这样的水成岩同样表明：昔日更短。

3.Key points: texture, structure and classification of sedimentary rocks.

重点：沉积岩的结构、构造和分类。

4.Texture of sedimentary rock: clastic texture and nonclastic texture.

沉积岩的结构：碎屑结构和非碎屑结构。

5.Sedimentary speed: unit time parts deposition on the surface of the metal thickness.

沉积速度：单位时间内零件表面沉积出金属的厚度。

6.The grain-size characteristics reflect the sedimentary environment.

沉积物的粒度特征反映了沉积环境。

7.Because of these advantages, sedimentary evidence can be dated with sufficient accuracy by radiometric methods to establish a precise chronology of the ice ages.

由于这些优点，可以通过辐射测量方法以足够确定沉积证据的年代，从而建立一个精确的冰河时代年表。

8.The sedimentary members are largely turbidites of greywacke facies.

沉积岩的组成大部分为杂砂岩相的浊积岩。

9.The sedimentary systems were divided according to the characteristics in rock types, color and authigene.

根据岩石类型、颜色、自生矿物等特征，对沉积体系进行划分。

10.The Grand Canyon is famous for its stunning layers of sedimentary 沉积的 rock.

大峡谷因其惊艳的层状沉积的岩石而闻名。

11.Geologists study sedimentary 沉积的 rocks to understand Earth's history.

地质学家研究沉积的岩石以了解地球的历史。

12.Many fossils are found in sedimentary 沉积的 rock formations.

许多化石发现于沉积的岩层中。

13.The process of forming sedimentary 沉积的 rock involves the compaction and cementation of sediments.

形成沉积的岩石的过程涉及沉积物的压实和胶结。

14.Limestone is a common type of sedimentary 沉积的 rock that is primarily composed of calcium carbonate.

石灰岩是一种常见的沉积的岩石，主要由碳酸钙组成。

作文

Sedimentary rocks are one of the three main types of rocks, alongside igneous and metamorphic rocks. They are formed through the accumulation and compaction of mineral and organic particles over time. Understanding the process of how these rocks are created can provide valuable insights into Earth’s history and the environment. The term sedimentary (沉积的) refers specifically to this type of rock formation, which involves layers of materials that have settled out of water or air. The formation of sedimentary (沉积的) rocks begins with the weathering and erosion of pre-existing rocks. As these rocks break down, they produce smaller particles like sand, silt, and clay. These particles are then transported by wind, water, or ice to new locations. Over time, they accumulate in bodies of water such as rivers, lakes, and oceans. This accumulation leads to the creation of layers, which is a defining characteristic of sedimentary (沉积的) rocks. As more layers build up on top of each other, the pressure from the weight of the overlying material causes the particles to compact. Additionally, minerals precipitate from water, acting as a natural cement that binds the particles together. This process can take thousands to millions of years, resulting in the solidification of sedimentary (沉积的) rocks. Common examples of sedimentary (沉积的) rocks include sandstone, limestone, and shale, each with unique characteristics based on their composition and formation process. One fascinating aspect of sedimentary (沉积的) rocks is their ability to preserve fossils. Because these rocks form in layers, they can capture and entomb organisms that lived in the environment at the time of deposition. This makes sedimentary (沉积的) rocks crucial for paleontology, as they provide a record of past life on Earth. Fossils found in sedimentary (沉积的) layers can give scientists clues about ancient ecosystems, climate conditions, and evolutionary processes. In addition to their role in preserving fossils, sedimentary (沉积的) rocks also play an essential part in the natural resources of our planet. Many important resources, such as coal, oil, and natural gas, are found within sedimentary (沉积的) formations. These resources are formed from organic materials that have been buried and subjected to heat and pressure over geological time scales. Therefore, understanding the distribution and formation of sedimentary (沉积的) rocks is vital for energy exploration and extraction. Moreover, sedimentary (沉积的) rocks are often indicators of past environmental conditions. The types of sediments found in a particular layer can reveal information about the climate at the time of deposition. For instance, the presence of certain fossils or sediment types can indicate whether the area was once a desert, a riverbed, or a marine environment. Geologists study these rocks to reconstruct the geological history of an area, helping us understand how Earth has changed over millions of years. In conclusion, sedimentary (沉积的) rocks are a fundamental component of Earth’s geology. Their formation process, fossil preservation capability, and resource potential make them significant for both scientific research and practical applications. By studying sedimentary (沉积的) rocks, we not only gain insights into Earth’s past but also enhance our ability to utilize its resources sustainably. As we continue to explore and understand these rocks, we unlock the secrets of our planet’s history and the processes that have shaped it over time.

沉积岩是三种主要岩石类型之一，另外两种是火成岩和变质岩。它们是通过矿物和有机颗粒的积累和压实而形成的。理解这些岩石是如何形成的过程，可以为我们提供关于地球历史和环境的宝贵见解。术语sedimentary（沉积的）特指这种岩石形成类型，涉及到从水或空气中沉淀下来的材料层。 sedimentary（沉积的）岩石的形成始于已有岩石的风化和侵蚀。当这些岩石分解时，它们会产生更小的颗粒，如沙子、淤泥和粘土。这些颗粒随后通过风、水或冰被运输到新的位置。随着时间的推移，它们在河流、湖泊和海洋等水体中积累。这种积累导致了层的形成，这是sedimentary（沉积的）岩石的一个定义特征。 随着更多层在彼此之上堆积，来自覆盖材料重量的压力导致颗粒压实。此外，矿物从水中沉淀，作为一种天然水泥将颗粒结合在一起。这个过程可能需要数千到数百万年的时间，导致sedimentary（沉积的）岩石的固化。常见的sedimentary（沉积的）岩石包括砂岩、石灰岩和页岩，每种岩石根据其成分和形成过程具有独特的特征。 sedimentary（沉积的）岩石的一个迷人方面是它们能够保存化石。因为这些岩石以层的形式形成，它们可以捕捉并埋葬当时生活在环境中的生物。这使得sedimentary（沉积的）岩石对古生物学至关重要，因为它们提供了地球过去生命的记录。在sedimentary（沉积的）层中发现的化石可以为科学家提供关于古代生态系统、气候条件和进化过程的线索。 除了在保存化石方面的作用外，sedimentary（沉积的）岩石在我们星球的自然资源中也扮演着重要角色。许多重要资源，如煤、石油和天然气，存在于sedimentary（沉积的）地层中。这些资源由被埋藏并经过地质时间尺度上的热和压力作用形成的有机材料构成。因此，理解sedimentary（沉积的）岩石的分布和形成对于能源勘探和开采至关重要。 此外，sedimentary（沉积的）岩石通常是过去环境条件的指示器。特定层中发现的沉积物类型可以揭示沉积时的气候信息。例如，某些化石或沉积物类型的存在可以表明该地区曾经是沙漠、河床或海洋环境。地质学家研究这些岩石以重建一个地区的地质历史，帮助我们理解地球在数百万年间是如何变化的。 总之，sedimentary（沉积的）岩石是地球地质的重要组成部分。它们的形成过程、化石保存能力和资源潜力使它们在科学研究和实际应用中具有重要意义。通过研究sedimentary（沉积的）岩石，我们不仅获得了对地球过去的见解，还增强了可持续利用其资源的能力。随着我们继续探索和理解这些岩石，我们解锁了我们星球历史的秘密以及塑造它的过程。