anhedral texture

简明释义

他形结构;

英英释义

例句

1.The presence of anhedral texture can indicate a high degree of metamorphism in the rock.

存在无晶形纹理可能表明岩石经历了高度变质作用。

2.In contrast to euhedral crystals, anhedral texture lacks well-defined crystal faces.

与有晶形晶体相比，无晶形纹理缺乏明确的晶面。

3.Geologists often analyze the anhedral texture of rocks to understand their formation history.

地质学家经常分析岩石的无晶形纹理以了解其形成历史。

4.The anhedral texture found in this granite suggests it cooled slowly beneath the Earth's surface.

在这块花岗岩中发现的无晶形纹理表明它在地球表面下缓慢冷却。

5.The mineral sample exhibited an anhedral texture, indicating that the crystals did not grow in open space.

这个矿物样本表现出无晶形纹理，表明晶体并没有在开放空间中生长。

作文

In the field of geology, the term anhedral texture refers to a specific type of crystal formation that lacks well-defined geometric shapes. Unlike euhedral crystals, which have clear and distinct boundaries due to their growth in an open space, anhedral texture describes minerals that have irregular shapes and are often tightly packed together. This phenomenon can occur during the cooling and solidification processes of molten rock or magma, where the conditions do not allow for the formation of perfect crystal forms.Understanding anhedral texture is crucial for geologists as it provides insights into the history of the rock's formation. For instance, when magma cools quickly, the resulting minerals may not have enough time to develop into well-formed crystals, leading to an anhedral texture. This can often be observed in volcanic rocks, where rapid cooling occurs upon eruption. In contrast, slower cooling allows for the growth of euhedral crystals, which can be found in igneous rocks that formed deep within the Earth’s crust.The significance of anhedral texture extends beyond just aesthetics; it can also influence the physical properties of the rock. Rocks with anhedral texture tend to have different porosity and permeability compared to those with euhedral crystals. This is important for various applications, including natural resource exploration, where understanding the texture of rocks can help in identifying potential reservoirs for oil, gas, or groundwater.Moreover, anhedral texture can also provide clues about the environmental conditions at the time of rock formation. For example, a predominance of anhedral texture in a particular area may indicate that the region experienced rapid geological changes, such as volcanic activity or tectonic movements. This information is invaluable for reconstructing past geological events and understanding the evolution of the Earth’s crust.In addition to its geological implications, anhedral texture has aesthetic value in the field of mineralogy. Collectors and enthusiasts often seek out specimens exhibiting this texture, as they can showcase unique patterns and colors that differ from their euhedral counterparts. The randomness of anhedral texture can create visually striking contrasts, making these minerals highly sought after for display purposes.In conclusion, the study of anhedral texture is a multifaceted aspect of geology that encompasses the formation, characteristics, and implications of irregular crystal structures. By examining anhedral texture, geologists can gain valuable insights into the conditions under which a rock was formed, its physical properties, and even its historical context. As we continue to explore the complexities of our planet, understanding the nuances of textures like anhedral texture will enhance our knowledge of Earth’s geological processes and contribute to advancements in various scientific fields.

在地质学领域，术语无晶纹理指的是一种特定类型的晶体形成，缺乏明确的几何形状。与具有清晰和明显边界的欧晶体不同，无晶纹理描述了形状不规则且通常紧密堆积在一起的矿物。这种现象可以发生在熔岩或岩浆的冷却和固化过程中，当条件不允许形成完美的晶体形状时，便会出现无晶纹理。理解无晶纹理对地质学家至关重要，因为它提供了关于岩石形成历史的见解。例如，当岩浆快速冷却时，所形成的矿物可能没有足够的时间发展成良好形成的晶体，从而导致无晶纹理的出现。这通常可以在火山岩中观察到，因为在喷发时迅速冷却。相比之下，较慢的冷却允许欧晶体的生长，这些晶体可以在深埋于地壳中的火成岩中找到。无晶纹理的重要性不仅仅在于美学；它还可以影响岩石的物理特性。与具有欧晶体的岩石相比，具有无晶纹理的岩石往往具有不同的孔隙度和渗透性。这对于各种应用都是重要的，包括自然资源勘探，在那里理解岩石的纹理可以帮助识别潜在的油气或地下水储层。此外，无晶纹理还可以提供关于岩石形成时环境条件的线索。例如，某一地区大量存在无晶纹理可能表明该地区经历了快速的地质变化，如火山活动或构造运动。这些信息对重建过去的地质事件和理解地壳的演变是无价的。除了其地质意义外，无晶纹理在矿物学领域也具有美学价值。收藏家和爱好者常常寻求展现这种纹理的标本，因为它们可以展示出与欧晶体对应物不同的独特图案和颜色。无晶纹理的随机性可以创造出视觉上引人注目的对比，使这些矿物在展示目的上备受追捧。总之，研究无晶纹理是地质学的一个多方面的方面，涉及不规则晶体结构的形成、特征和影响。通过检查无晶纹理，地质学家可以获得关于岩石形成条件、物理特性甚至历史背景的宝贵见解。随着我们继续探索地球的复杂性，理解像无晶纹理这样的纹理的细微差别将增强我们对地球地质过程的认识，并促进各个科学领域的进步。