banded iron formation

简明释义

1. 条带状含铁建造; 2. 条带状铁建造; 3. 燧石质含铁层;

英英释义

例句

1.The study of banded iron formations 带状铁矿层 has helped scientists understand the Earth's early atmosphere.

对带状铁矿层 banded iron formations的研究帮助科学家理解地球早期的大气。

2.The banded iron formation 带状铁矿层 in this region dates back over two billion years.

该地区的带状铁矿层 banded iron formation可以追溯到超过二十亿年前。

3.In mining, banded iron formations 带状铁矿层 are significant sources of iron ore.

在采矿中，带状铁矿层 banded iron formations是重要的铁矿石来源。

4.The geologist explained how the banded iron formation 带状铁矿层 provides evidence of ancient oceanic conditions.

地质学家解释了如何通过带状铁矿层 banded iron formation提供古代海洋条件的证据。

5.During our field trip, we observed a beautiful banded iron formation 带状铁矿层 that showcased a variety of colors.

在我们的实地考察中，我们观察到一个美丽的带状铁矿层 banded iron formation，展示了多种颜色。

作文

The Earth is a complex system that has undergone numerous geological and biological changes over billions of years. One of the most fascinating aspects of Earth's history is the formation of certain types of rocks, particularly the banded iron formation. These formations are sedimentary rocks that consist of alternating layers of iron-rich minerals and silica, which provide important clues about the conditions of the early Earth. The banded iron formation (BIF) is believed to have formed primarily between 3.8 and 1.8 billion years ago, during a time when the planet's atmosphere was largely anoxic, meaning it lacked significant amounts of oxygen.During this period, the oceans were rich in dissolved iron. The process of photosynthesis, carried out by ancient microorganisms such as cyanobacteria, began to release oxygen into the atmosphere. This increase in oxygen led to the oxidation of dissolved iron in the seawater, resulting in the precipitation of iron oxides. As these iron oxides settled on the ocean floor, they formed distinct layers, giving rise to the characteristic bands seen in banded iron formations.The study of banded iron formations is essential for several reasons. Firstly, they serve as a record of the Earth's atmospheric evolution. The transition from an anoxic environment to one rich in oxygen had profound effects on the development of life. Understanding this transition helps scientists comprehend how life evolved and adapted to changing conditions.Secondly, banded iron formations are significant economically. They are a primary source of iron ore, which is crucial for steel production. The extraction and utilization of iron from these formations have played a vital role in the industrial development of many countries. Thus, studying banded iron formations not only enhances our understanding of geology but also has practical implications for industry and technology.Moreover, the presence of banded iron formations can indicate specific geological environments and processes. For instance, their occurrence is often associated with ancient oceanic settings where conditions favored the deposition of iron-rich sediments. Geologists can use this information to reconstruct past environments and understand the geological history of a region.In conclusion, the banded iron formation is more than just a geological curiosity; it is a window into the Earth's past. By studying these formations, we gain insights into the evolution of the atmosphere, the development of life, and the geological processes that shaped our planet. The significance of banded iron formations extends beyond geology, impacting industries and providing a deeper understanding of Earth's history. As research continues, we can expect to uncover even more about these remarkable formations and their role in the story of our planet.

地球是一个复杂的系统，在数十亿年的时间里经历了无数的地质和生物变化。地球历史上最迷人的方面之一是某些类型岩石的形成，特别是带状铁矿层。这些形成是沉积岩，由富含铁的矿物和二氧化硅交替层组成，它们提供了关于早期地球条件的重要线索。带状铁矿层（BIF）被认为主要形成于38亿到18亿年前，那时地球的大气层基本上是缺氧的，这意味着它缺乏显著量的氧气。在这一时期，海洋中溶解的铁丰富。古代微生物如蓝藻进行光合作用，开始向大气释放氧气。这种氧气的增加导致了海水中溶解铁的氧化，导致铁氧化物的沉淀。当这些铁氧化物沉降到海底时，形成了独特的层次，产生了带状铁矿层所见的特征性条纹。研究带状铁矿层至关重要，原因有几个。首先，它们作为地球大气演变的记录。由缺氧环境转变为富氧环境对生命的发展产生了深远的影响。理解这一转变有助于科学家理解生命如何在变化的条件下进化和适应。其次，带状铁矿层在经济上具有重要意义。它们是铁矿石的主要来源，而铁矿石对于钢铁生产至关重要。从这些形成中提取和利用铁在许多国家的工业发展中发挥了重要作用。因此，研究带状铁矿层不仅增强了我们对地质学的理解，而且对工业和技术有实际的影响。此外，带状铁矿层的存在可以指示特定的地质环境和过程。例如，它们的出现通常与古代海洋环境相关，在这些环境中，有利于富含铁的沉积物的沉积。地质学家可以利用这些信息重建过去的环境，并理解一个地区的地质历史。总之，带状铁矿层不仅仅是地质上的好奇心；它是通往地球过去的窗口。通过研究这些形成，我们获得了对大气演变、生命发展和塑造我们星球的地质过程的深刻见解。带状铁矿层的重要性超越了地质学，对工业产生影响，并提供了对地球历史更深层次的理解。随着研究的继续，我们可以期待揭示更多关于这些显著形成及其在我们星球故事中的角色。