pahoehoe

简明释义

英[pəˈhəʊɪhəʊɪ]美[pɑːˈhoʊiˌhoʊi]

n. [地质] 绳状熔岩

英英释义

单词用法

同义词

反义词

例句

1.This smooth flowing lava is known as pahoehoe.

这是顺利熔岩流帕霍霍知道。

2.A segment of pahoehoe at Craters of the Moon that has had the top of its surface broken off, revealing a rust color below.

分别在这带来了其表面的顶部部分中断月球陨石坑的帕霍霍，露出铁锈色如下。

3.A segment of pahoehoe at Craters of the Moon that has had the top of its surface broken off, revealing a rust color below.

分别在这带来了其表面的顶部部分中断月球陨石坑的帕霍霍，露出铁锈色如下。

4.The volcanic landscape was filled with smooth, shiny pahoehoe lava that looked almost like a river of molten glass.

火山景观中充满了光滑、闪亮的熔岩流，看起来几乎像一条熔融玻璃的河流。

5.The pahoehoe lava fields are a popular attraction for tourists visiting Hawaii.

对于前往夏威夷的游客来说，熔岩流区域是一个热门景点。

6.Walking on pahoehoe is like walking on a giant, hardened pancake.

走在熔岩流上就像走在一个巨大的、硬化的煎饼上。

7.Hiking over the pahoehoe formations can be tricky due to their uneven surface.

在熔岩流地形上徒步旅行可能会很棘手，因为它们的表面不平坦。

8.Geologists study pahoehoe to understand the flow dynamics of lava during eruptions.

地质学家研究熔岩流以了解火山喷发时熔岩的流动动态。

作文

When we think of volcanic landscapes, the image that often comes to mind is one of jagged rocks and explosive eruptions. However, there is a unique type of lava flow that creates a different kind of beauty, known as pahoehoe. This term, derived from the Hawaiian language, describes a smooth, billowy, and often shiny surface created by the cooling of basaltic lava. Understanding pahoehoe is not just about geology; it also opens a window into the natural processes that shape our planet.The formation of pahoehoe occurs when lava is relatively low in viscosity, allowing it to flow easily across the landscape. As the lava moves, it can stretch and form thin sheets, creating the characteristic ropy texture that defines pahoehoe. This fluidity is a result of the high temperature of the lava, which can exceed 1,100 degrees Celsius (2,000 degrees Fahrenheit). When this hot lava cools, it solidifies into a smooth surface that contrasts sharply with the rough, jagged formations of other types of lava flows, such as 'aa', which is much more viscous and creates a clinkery, broken surface.One of the most fascinating aspects of pahoehoe is its ability to change over time. As the lava continues to flow and cool, it can develop different textures and appearances. For instance, when the surface of pahoehoe begins to cool, it can form a crust that traps the molten lava underneath. This trapped lava can continue to flow, causing the crust to bulge and create impressive formations like lava tubes. These tubes are natural conduits for lava, allowing it to travel long distances without losing heat, which further contributes to the unique geological features of volcanic regions.The visual appeal of pahoehoe cannot be overstated. Its smooth, glossy surface often reflects light in a way that enhances the vibrant colors of the surrounding environment. In many Hawaiian landscapes, where pahoehoe is commonly found, the contrast between the dark lava and the lush green vegetation creates stunning vistas. This interplay of colors and textures makes pahoehoe not only a subject of scientific interest but also a source of inspiration for artists and photographers alike.Moreover, the study of pahoehoe has practical implications for understanding volcanic activity and predicting eruptions. By analyzing the characteristics of different lava flows, scientists can gain insights into the behavior of volcanoes. For example, an increase in pahoehoe flows may indicate a shift in volcanic activity that could precede an eruption. This knowledge is crucial for the safety of communities living near active volcanoes, as it helps in developing effective monitoring systems and evacuation plans.In conclusion, pahoehoe is more than just a geological term; it represents a fascinating aspect of our planet's dynamic nature. From its unique formation and aesthetic qualities to its significance in volcanic research, pahoehoe serves as a reminder of the power and beauty of nature. Whether one is a scientist, an artist, or simply a lover of the outdoors, understanding pahoehoe enriches our appreciation of the world around us. The next time you encounter a volcanic landscape, take a moment to observe the pahoehoe and reflect on the incredible processes that have shaped it.

当我们想到火山景观时，常常浮现在脑海中的图像是锯齿状的岩石和爆炸性的喷发。然而，有一种独特的熔岩流创造出不同类型的美，被称为pahoehoe。这个词源于夏威夷语，描述了由玄武岩熔岩冷却而形成的光滑、波浪状且通常闪亮的表面。理解pahoehoe不仅仅是关于地质学；它还为我们打开了一扇了解塑造我们星球的自然过程的窗口。pahoehoe的形成发生在熔岩相对低粘度的情况下，使其能够轻松流过地形。当熔岩移动时，它可以拉伸并形成薄片，创造出定义pahoehoe的特征性绳状纹理。这种流动性是由于熔岩的高温，可能超过1100摄氏度（2000华氏度）。当这种热熔岩冷却时，它固化成光滑的表面，与其他类型熔岩流（如'aa'）形成鲜明对比，后者粘度更高，产生破碎的、粗糙的表面。pahoehoe的一个迷人之处在于它随时间变化的能力。当熔岩继续流动和冷却时，它可以发展出不同的纹理和外观。例如，当pahoehoe的表面开始冷却时，它可以形成一个壳层，将下面的熔融熔岩困住。被困的熔岩可以继续流动，导致壳层隆起，形成令人印象深刻的结构，如熔岩管。这些管道是熔岩的自然通道，使其能够在不失去热量的情况下长途旅行，这进一步有助于火山区域独特地质特征的形成。pahoehoe的视觉吸引力不容小觑。它光滑、光亮的表面往往以一种增强周围环境生动色彩的方式反射光线。在许多夏威夷景观中，pahoehoe常见，黑色熔岩与郁郁葱葱的绿色植被之间的对比创造了惊艳的景观。这种颜色和纹理的相互作用使得pahoehoe不仅成为科学兴趣的主题，也成为艺术家和摄影师的灵感来源。此外，研究pahoehoe对理解火山活动和预测喷发具有实际意义。通过分析不同熔岩流的特征，科学家可以获得关于火山行为的见解。例如，pahoehoe流的增加可能表明火山活动的变化，这可能会在喷发之前发生。这一知识对于生活在活火山附近的社区的安全至关重要，因为它有助于制定有效的监测系统和撤离计划。总之，pahoehoe不仅仅是一个地质术语；它代表了我们星球动态本质的迷人方面。从它独特的形成和美学特质到它在火山研究中的重要性，pahoehoe提醒我们自然的力量和美丽。无论你是科学家、艺术家还是单纯热爱户外的人，理解pahoehoe都能丰富我们对周围世界的欣赏。下次当你遇到火山景观时，花一点时间观察一下pahoehoe，并思考塑造它的不可思议的过程。