tonalite-trondhjemite-granodiorite

名词 n.

英文释义

名词 n.
  1. A group of silica-rich intrusive igneous rocks that mainly formed in Earth’s early history. They are considered some of the primary building blocks of the oldest continental crust and are typically produced by partial melting of hydrated basalt deep in the crust or mantle. uncountable

词形变化

TTG abbreviation
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