花崗石 (快!!! 交功課的~!!!!)please~!!!!!!!!!!!!!!!!!

Granite (IPA: /ˈgranɪt/) is a common and widely occurring type of intrusive, felsic, igneous rock.

Granites are usually medium to coarse grained, occasionally with some individual crystals larger than the groundmass forming a rock known as porphyry. Granites can be pink to dark gray or even black, depending on their chemistry and mineralogy.

Outcrops of granite tend to form tors, rounded massifs, and terrains of rounded boulders cropping out of flat, sandy soils. Granites sometimes occur in circular depressions surrounded by a range of hills, formed by the metamorphic aureole or hornfels.

Granite is nearly always massive, hard and tough, and it is for this reason it has gained widespread use as a construction stone.

The average density of granite is 2.75 g·cm−3 with a range of 1.74 g·cm−3 to 2.80 g·cm−3.

The word granite comes from the Latin granum, a grain, in reference to the coarse-grained structure of such a crystalline rock.




花崗岩
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花崗岩是一種岩漿在地表以下凝卻形成火成岩，主要成分是長石和石英。花崗岩質地堅硬，難被酸鹼或風化作用侵蝕，常被用於建築物的材料。


[編輯] 命名由來
花崗岩（Granite）的語源是拉丁文的granum，意思是穀粒或顆粒。因為花崗岩是深成岩，常能形成發育良好、肉眼可辨的礦物顆粒，因而得名。
而漢字名詞花崗岩則是由日本人翻譯而來。幕末～明治初期的辭典與地質學書籍將Granite翻譯作花崗岩或花剛岩。花形容這種岩石有美麗的斑紋，剛或崗則表示這種岩石很堅硬，也就是有著花般斑紋的剛硬岩石的意思。中國學者則沿用此譯名。