metamorphic rock

简明释义

变质岩

英英释义

例句

1.The Grand Canyon showcases various layers of metamorphic rock (变质岩) that have been formed over millions of years.

大峡谷展示了多层的变质岩（变质岩），这些岩石经过数百万年的形成。

2.In construction, metamorphic rock (变质岩) such as marble is often used for countertops and flooring.

在建筑中，像大理石这样的变质岩（变质岩）常用于台面和地板。

3.Schist is a common type of metamorphic rock (变质岩) known for its foliated texture.

片岩是一种常见的变质岩（变质岩），以其层状纹理而闻名。

4.The presence of metamorphic rock (变质岩) can indicate significant geological activity in an area.

变质岩（变质岩）的存在可能表明该地区有显著的地质活动。

5.Geologists study metamorphic rock (变质岩) to understand the conditions under which they were formed.

地质学家研究变质岩（变质岩）以了解它们形成的条件。

作文

Metamorphic rocks are fascinating geological formations that have undergone significant changes due to heat, pressure, and mineral exchange. These processes transform existing rocks, either igneous or sedimentary, into new types of rock with distinct characteristics. The term metamorphic rock (变质岩) originates from the Greek words 'meta,' meaning change, and 'morph,' meaning form. This etymology perfectly captures the essence of what these rocks represent in the Earth's crust.One of the most intriguing aspects of metamorphic rock (变质岩) is its ability to tell a story about the conditions under which it formed. For example, the presence of certain minerals within a metamorphic rock (变质岩) can indicate the temperature and pressure levels that existed during its transformation. Common minerals found in metamorphic rocks (变质岩) include garnet, schist, and quartzite, each providing clues about the geological history of the area.The formation of metamorphic rocks (变质岩) typically occurs deep within the Earth's crust, where temperatures can rise significantly and pressure can become immense. When pre-existing rocks are subjected to these extreme conditions, their physical and chemical properties change, leading to the creation of metamorphic rocks (变质岩). This process is known as metamorphism, and it can occur over millions of years, resulting in a wide variety of rock types.There are two primary types of metamorphism that lead to the formation of metamorphic rocks (变质岩): contact metamorphism and regional metamorphism. Contact metamorphism occurs when rocks are heated by nearby molten magma, causing localized changes. In contrast, regional metamorphism involves large-scale geological processes, such as tectonic plate movements, which apply pressure and heat over extensive areas. Both processes contribute to the rich diversity of metamorphic rocks (变质岩) found around the world.In addition to their geological significance, metamorphic rocks (变质岩) also have practical applications. Many of these rocks, such as marble and slate, are prized for their beauty and durability, making them popular choices for construction and artistic endeavors. Marble, for instance, is a metamorphic rock (变质岩) derived from limestone and is widely used in sculptures and buildings due to its aesthetic appeal and workability.Furthermore, studying metamorphic rocks (变质岩) provides valuable insights into the Earth's history and the processes that shape our planet. Geologists often analyze these rocks to understand past environmental conditions, including tectonic activity, volcanic events, and climate changes. By examining the characteristics of metamorphic rocks (变质岩), scientists can reconstruct the geological history of an area, helping us to appreciate the dynamic nature of our planet.In conclusion, metamorphic rocks (变质岩) are not just ordinary stones; they are remarkable records of the Earth's geological processes. Their formation through heat and pressure serves as a reminder of the powerful forces at work beneath our feet. As we continue to explore and study these unique rocks, we deepen our understanding of the Earth’s history and the intricate systems that govern its evolution.