basal unconformity

简明释义

底部不整合;

英英释义

例句

1.In this region, the basal unconformity 基底不整合面 is dated to the late Paleozoic era.

在这个地区，基底不整合面 basal unconformity 的年代被确定为晚古生代。

2.Understanding the basal unconformity 基底不整合面 helps in reconstructing the geological history of the area.

理解基底不整合面 basal unconformity 有助于重建该地区的地质历史。

3.During the field trip, we observed a clear basal unconformity 基底不整合面 between the sedimentary layers.

在实地考察中，我们观察到了沉积层之间明显的基底不整合面 basal unconformity。

4.The presence of a basal unconformity 基底不整合面 can suggest past tectonic activity.

存在基底不整合面 basal unconformity 可能表明过去的构造活动。

5.The geologist explained that the basal unconformity 基底不整合面 indicates a significant gap in the geological record.

地质学家解释说，基底不整合面 basal unconformity 表示地质记录中存在显著的空白。

作文

In the study of geology, understanding the various types of unconformities is crucial for interpreting the Earth's history. One significant type is the basal unconformity, which represents a gap in the geological record that occurs at the base of sedimentary layers. This phenomenon typically arises when older rocks are subjected to erosion before newer sediments are deposited on top of them. The basal unconformity can provide valuable insights into the processes that have shaped our planet over millions of years.When examining the formation of a basal unconformity, it is essential to recognize how it indicates a period of non-deposition or erosion. For instance, if sedimentary rocks are laid down sequentially, a basal unconformity may form if there is a significant time gap where no new sediments accumulate, often due to tectonic activity or changes in sea level. This gap can result in a mismatch between the ages of the underlying and overlying rock layers, which geologists must carefully analyze to reconstruct the geological timeline.The presence of a basal unconformity can also signify important environmental changes. For example, an unconformity might indicate a transition from marine to terrestrial conditions, reflecting shifts in climate or sea levels. By studying these unconformities, scientists can better understand the dynamic nature of the Earth’s surface and the various forces that influence it.Geological formations with basal unconformities often serve as key locations for fossil discoveries, as they can preserve evidence of ancient life during periods of rapid change. The study of these fossils can reveal how organisms adapted to shifting environments and can provide clues about past biodiversity. Therefore, the significance of a basal unconformity extends beyond mere geological interest; it is a window into the evolutionary history of life on Earth.Moreover, the identification of basal unconformities plays a critical role in resource exploration. For instance, oil and gas deposits are frequently found in sedimentary basins that exhibit unconformities, as these geological features can create traps for hydrocarbons. As such, understanding the presence and characteristics of a basal unconformity can guide exploration efforts and inform economic decisions related to natural resource extraction.In conclusion, the basal unconformity is not just a technical term used by geologists; it is a vital concept that encapsulates the complex interplay of geological processes over time. By studying these unconformities, we gain a deeper appreciation for the Earth's history, the evolution of life, and the resources that lie beneath our feet. The ongoing research into basal unconformities continues to enhance our understanding of the planet, making it a fascinating topic for both scientists and enthusiasts alike.

在地质学的研究中，理解各种类型的不整合面对解释地球历史至关重要。其中一个重要的类型是基底不整合面，它代表了沉积层基部的地质记录中的间隙。这种现象通常发生在较老的岩石受到侵蚀后，新的沉积物在其上方沉积。基底不整合面可以为我们提供关于塑造我们星球数百万年历史的过程的宝贵见解。在研究基底不整合面的形成时，必须认识到它如何指示非沉积或侵蚀的时期。例如，如果沉积岩层按顺序铺设，当没有新的沉积物积累的显著时间间隔出现时，就可能形成基底不整合面，这通常是由于构造活动或海平面变化引起的。这个间隙可能导致底层和上层岩石层之间的年龄不匹配，地质学家必须仔细分析这些不整合面，以重建地质时间表。基底不整合面的存在也可能意味着重要的环境变化。例如，一个不整合面可能指示从海洋环境转变为陆地条件，反映气候或海平面的变化。通过研究这些不整合面，科学家可以更好地理解地球表面的动态特性以及影响它的各种力量。具有基底不整合面的地质构造通常是化石发现的关键地点，因为它们能够保存快速变化期间古代生命的证据。这些化石的研究可以揭示生物如何适应不断变化的环境，并提供有关过去生物多样性的线索。因此，基底不整合面的重要性不仅仅限于地质兴趣；它是我们了解地球进化历史的窗口。此外，识别基底不整合面在资源勘探中起着至关重要的作用。例如，石油和天然气沉积物常常出现在表现出不整合面的沉积盆地中，因为这些地质特征可以为碳氢化合物创造陷阱。因此，了解基底不整合面的存在和特征可以指导勘探工作，并为与自然资源开采相关的经济决策提供信息。总之，基底不整合面不仅仅是地质学家使用的一个术语；它是一个重要概念，概括了地质过程随时间的复杂相互作用。通过研究这些不整合面，我们对地球的历史、生命的演变以及我们脚下的资源有了更深刻的理解。对基底不整合面的持续研究不断增强我们对地球的理解，使其成为科学家和爱好者都感兴趣的迷人主题。