?火山巖是指在火山噴發(fā)過程中噴出的熔巖在地表或地下冷卻凝固形成的巖石。它的主要成分是硅酸鹽，包括火山玄武巖、安山巖、流紋巖等。在地質(zhì)學上，火山巖又被稱為火成巖。

How to pronounce: [v?l?ke?n?k r?k]

Usage:

火山巖是一種常見的地質(zhì)學術語，通常用于描述由火山活動形成的巖石。它可以被用作名詞或形容詞，在句子中通常位于名詞前面。

Example sentences:

1. The island is formed by layers of volcanic rock.

這個島嶼是由層層堆積的火山巖形成的。

2. The road was blocked by a large piece of volcanic rock.

一塊巨大的火山巖擋住了道路。

3. The landscape was covered in black volcanic rocks.

景觀被黑色的火山巖覆蓋著。

4. The geologist studied the composition of the volcanic rock samples.

地質(zhì)學家研究了這些火山巖樣本的組成。

5. The village was built on of a dormant volcano, surrounded by layers of volcanic rock.

這個村莊建在一座休眠火山之上，周圍都是層層的火山巖。

Synonyms and usage:

1. Lava - molten rock that flows out of a volcano during an eruption.

Example: The lava from the volcano destroyed several villages.

2. Magma - molten rock beneath the earth's surface.

Example: The magma chamber beneath the volcano was starting to fill up.

3. Tuff - a type of volcanic rock formed from compacted volcanic ash.

Example: The cliffs were made of layers of tuff, showing the history of volcanic eruptions.

4. Pyroclastic - relating to fragments of rock and lava ejected from a volcano during an eruption.

Example: The pyroclastic flow from the volcano caused widespread destruction.

5. Caldera - a large crater at the of a volcano formed by the collapse of its cone.

Example: The caldera at the of Mount Vesuvius is a popular tourist attraction.

Editor's summary:

火山巖是由火山活動形成的一種巖石，主要成分是硅酸鹽。它可以被用作名詞或形容詞，在句子中通常位于名詞前面。它的同義詞包括熔巖、巖漿、火山碎屑等?；鹕綆r在地質(zhì)學和旅游領域都有重要的意義，值得我們深入了解。