felsic

/ˈfel.sɪk/ (bre, ipa) · /ˈfel.sɪk/ (ame, ipa) · /ˈfelsik/ (ame, mw)

felsic — 形容詞

  • felsicpositive
  • more felsiccomparative
  • most felsicsuperlative

1. describing rock or magma with much silica and many light minerals, especially fe

1.形容詞C2
釋義

長英質

指富含矽與淺色礦物的岩石或岩漿

describing rock or magma with much silica and many light minerals, especially feldspar, so it is usually pale in color

例句

Sirin labeled the pale granite sample as felsic during the lab exercise.

Sirin 在實驗課上把那塊淺色花崗岩樣本標成長英質。

pattern: label a sample as felsic

The report calls this lava felsic because it contains much silica.

報告把這股熔岩稱為長英質，因為它含有大量矽。

pattern: call lava felsic

同義詞
  • silica-rich

    a broader descriptive term that explains composition directly, while 'felsic' is the fixed geology label

  • granitic

    often suggests composition or texture similar to granite, so it is narrower than the wider class named by 'felsic'

反義詞
  • mafic

    the technical opposite for darker rock that contains more iron and magnesium

文法句型

be felsic

describe [rock or magma] as felsic

felsic + rock / magma / lava / mineral

用法筆記

Mostly used in geology for rock, magma, lava, and minerals. It commonly follows 'be' or appears after verbs such as 'label', 'classify', and 'describe' when scientists identify a sample's composition.

常見錯誤

❌The mountain is felsic because it is light gray.
✅The rock is felsic because it contains much silica and light minerals.
💡The word describes composition, not color by itself.
❌This felsic is easy to cut.
✅This felsic rock is easy to cut.
💡'felsic' is an adjective, so it needs a noun such as 'rock' or 'magma'.