Trachytes

常見例句

• Volcanic rocks in Chabaoma formation should be belonged to high pressure type trachyt,formed by the magma beneath thickened crust, the exact extrusive era could be mid-late period of Miocene.
  查保馬組火山巖應屬於在陸殼增厚的背景下,加厚陸殼底部産生的粗麪巖巖漿上湧形成的粗麪巖,時代應爲中新世中晚期。
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