accretional prism

简明释义

1. 加积层系; 2. 增生沉积柱状伐; 3. 增长棱柱伐;

英英释义

例句

1.Researchers discovered that the accretional prism plays a critical role in the tectonic stability of the region.

研究人员发现，增生棱柱在该地区的构造稳定性中起着关键作用。

2.The accretional prism is formed by the accumulation of sediments and volcanic materials over time.

增生棱柱是通过沉积物和火山材料随时间积累而形成的。

3.The size of the accretional prism can indicate the intensity of tectonic activity in the area.

在该地区，增生棱柱的大小可以指示构造活动的强度。

4.The geological study focused on the formation of the accretional prism in the subduction zone.

这项地质研究集中于在俯冲带中形成的增生棱柱。

5.Sediments accumulating in the accretional prism can provide valuable insights into past geological events.

在增生棱柱中积累的沉积物可以为过去的地质事件提供宝贵的见解。

作文

The concept of an accretional prism is fundamental in the field of geology, particularly in understanding the processes that shape our planet's surface. An accretional prism refers to a geological formation that occurs at convergent plate boundaries, where one tectonic plate is forced under another in a process known as subduction. This phenomenon leads to the accumulation of sediments and materials from the oceanic crust onto the continental crust, creating a wedge-shaped mass known as the accretional prism. In essence, the accretional prism is formed through the continuous addition of sediments that are scraped off the descending plate. As the oceanic plate subducts, it carries with it water, sediments, and various minerals. These materials are then deposited on the edge of the continental plate, leading to the growth of the accretional prism. This process not only contributes to the physical structure of the Earth but also plays a significant role in the geological activity of the region. One of the most notable examples of an accretional prism can be found along the coasts of Japan and the Pacific Northwest of the United States. The Cascadia Subduction Zone, for instance, is a classic case where the Juan de Fuca Plate is being subducted beneath the North American Plate, resulting in the formation of the Cascadia accretional prism. This area is characterized by a variety of geological features, including mountain ranges, deep ocean trenches, and volcanic activity.Understanding the dynamics of an accretional prism is crucial for geologists, as it helps in predicting geological hazards such as earthquakes and tsunamis. The pressure that builds up in these regions due to the accumulation of materials can lead to significant seismic activity. For example, the 2011 Tōhoku earthquake in Japan was influenced by the interactions occurring at the subduction zone, highlighting the importance of studying accretional prisms in relation to natural disasters.In addition to their geological significance, accretional prisms can also provide valuable insights into the history of the Earth's crust. By analyzing the layers of sediments within an accretional prism, scientists can reconstruct past environments, climate changes, and even biological evolution. This sedimentary record serves as a time capsule, offering clues about how the Earth has changed over millions of years.In conclusion, the study of accretional prisms is essential for understanding not only the geological processes that shape our planet but also the potential risks associated with living near tectonic boundaries. As we continue to explore and research these fascinating structures, we gain a deeper appreciation for the dynamic nature of the Earth and the forces that continuously mold its surface. The accretional prism serves as a reminder of the intricate and ever-changing landscape of our planet, inviting further investigation and discovery in the realm of geology.

“增生棱柱”这一概念在地质学领域中至关重要，尤其是在理解塑造我们星球表面的过程时。“增生棱柱”是指发生在汇聚板块边界的地质构造，在这里，一个构造板块被迫位于另一个构造板块之下，这一过程称为俯冲。这一现象导致海洋地壳上的沉积物和材料累积到大陆地壳上，形成一个楔形的质量，被称为“增生棱柱”。从本质上讲，“增生棱柱”是通过从下降的板块上刮掉的沉积物的持续添加而形成的。当海洋板块俯冲时，它携带着水、沉积物和各种矿物。这些材料随后被沉积在大陆板块的边缘，导致“增生棱柱”的生长。这个过程不仅有助于地球的物理结构，还在该地区的地质活动中起着重要作用。最著名的“增生棱柱”例子之一可以在日本沿海和美国太平洋西北部找到。例如，喀斯喀特俯冲带就是一个经典案例，其中胡安·德·富卡板块正在俯冲到北美板块之下，导致喀斯喀特“增生棱柱”的形成。该地区的特征包括山脉、深海沟和火山活动。理解“增生棱柱”的动态对地质学家至关重要，因为它有助于预测地质灾害，如地震和海啸。在这些地区，由于材料的累积造成的压力可能导致显著的地震活动。例如，2011年日本东日本大地震受到了发生在俯冲带的相互作用的影响，这突显了研究“增生棱柱”与自然灾害之间关系的重要性。除了地质意义外，“增生棱柱”还可以提供有关地球地壳历史的宝贵见解。通过分析“增生棱柱”内的沉积层，科学家可以重建过去的环境、气候变化，甚至生物演化。这种沉积记录作为一个时间胶囊，提供了关于地球数百万年来如何变化的线索。总之，研究“增生棱柱”对于理解不仅是塑造我们星球的地质过程，而且是生活在构造边界附近的潜在风险至关重要。随着我们继续探索和研究这些迷人的结构，我们对地球动态本质的认识加深，以及不断塑造其表面的力量。“增生棱柱”提醒我们关注我们星球复杂而不断变化的景观，邀请我们在地质学领域进行进一步的调查和发现。