key bed

简明释义

键座

英英释义

例句

1.In paleontology, a key bed can provide insights into ancient ecosystems.

在古生物学中，关键层可以提供对古代生态系统的洞察。

2.The construction team had to avoid disturbing the key bed during the foundation work.

施工团队在基础工作中必须避免破坏关键层。

3.The geologist explained that the key bed is crucial for understanding the region's sedimentary history.

地质学家解释说，关键层对于理解该地区的沉积历史至关重要。

4.During the excavation, they discovered a key bed that contained fossils dating back millions of years.

在挖掘过程中，他们发现了一个包含数百万年前化石的关键层。

5.The stratigraphic analysis revealed a key bed that helped identify the geological time period.

地层分析显示出一个关键层，帮助识别地质时期。

作文

In the field of geology, understanding the concept of a key bed is crucial for interpreting sedimentary rock layers. A key bed refers to a specific layer of sedimentary rock that is particularly distinctive and can be used as a reference point for correlating other layers across different locations. This distinctive layer usually has unique characteristics, such as a particular mineral composition, color, or fossil content, making it easily identifiable. Geologists often use key beds to establish the relative ages of rock formations and to understand the geological history of an area.The significance of a key bed lies in its ability to provide a reliable marker within the stratigraphic column. For instance, if a geologist discovers a key bed in one location, they can trace that same layer to other areas, allowing them to make inferences about the geological processes that occurred in those regions. This correlation helps in constructing a more comprehensive picture of the earth's history and the environmental conditions that prevailed at different times.Moreover, key beds can also play an important role in the field of paleontology. By studying the fossils found within a key bed, scientists can gain insights into the types of organisms that existed during the time the bed was formed. This information is invaluable for understanding evolutionary processes and for reconstructing past ecosystems.In practical applications, key beds are essential for resource exploration, such as oil and gas. When geologists identify a key bed that indicates the presence of hydrocarbons, they can focus their exploration efforts more effectively. This not only saves time and resources but also increases the chances of successful extraction.To illustrate the importance of key beds, consider the example of the Cretaceous-Tertiary (K-T) boundary, which is a well-known key bed associated with the mass extinction event that wiped out the dinosaurs. The K-T boundary is characterized by a distinct layer rich in iridium, a rare element often associated with asteroid impacts. By studying this key bed, scientists have been able to piece together the events leading to the extinction and understand the impact of extraterrestrial forces on Earth’s biological history.In conclusion, the concept of a key bed is fundamental in geology and paleontology. It serves as a vital tool for correlating rock layers, understanding geological history, and locating natural resources. The study of key beds enhances our knowledge of the Earth’s past and provides insights that are critical for both scientific research and practical applications. As we continue to explore and understand our planet, the role of key beds will undoubtedly remain significant in unraveling the mysteries of Earth’s geological and biological evolution.

在地质学领域，理解“key bed”这一概念对于解释沉积岩层至关重要。“key bed”是指特定的沉积岩层，它具有特别显著的特征，可以用作不同地点之间其他层的参考点。这一显著层通常具有独特的特征，例如特定的矿物成分、颜色或化石含量，使其易于识别。地质学家通常使用“key beds”来建立岩石形成的相对年龄，并了解一个地区的地质历史。“key bed”的重要性在于它能够提供一个可靠的标记，在地层柱中。例如，如果地质学家在一个地方发现了“key bed”，他们可以将同一层追溯到其他区域，从而推断这些地区发生的地质过程。这种关联有助于构建地球历史的更全面的图景，以及不同时间存在的环境条件。此外，“key beds”在古生物学领域也起着重要作用。通过研究“key bed”中的化石，科学家可以深入了解在该层形成时存在的生物种类。这些信息对于理解进化过程和重建过去的生态系统至关重要。在实际应用中，“key beds”对于资源勘探，如石油和天然气，也至关重要。当地质学家识别出一个表明存在碳氢化合物的“key bed”时，他们可以更有效地集中勘探工作。这不仅节省了时间和资源，还增加了成功提取的机会。为了说明“key beds”的重要性，考虑一下白垩纪-第三纪（K-T）边界的例子，这是一个与消灭恐龙的大规模灭绝事件相关的著名“key bed”。K-T边界的特征是富含铱的明显层，这是一种通常与小行星撞击相关的稀有元素。通过研究这个“key bed”，科学家们能够拼凑出导致灭绝的事件，并理解外星力量对地球生物历史的影响。总之，“key bed”的概念在地质学和古生物学中是基础性的。它作为一种重要工具，用于关联岩层、理解地质历史和寻找自然资源。“key beds”的研究增强了我们对地球过去的认识，并提供了对科学研究和实际应用至关重要的见解。随着我们继续探索和理解我们的星球，“key beds”的角色无疑将在揭示地球地质和生物演化的奥秘中保持重要性。