tán thạch

Một tảng tán thạch nằm giữa bãi đá ven đường.

Definition

1. Noun (Geology):
   • Mylonite: A fine-grained, compact metamorphic rock formed by the extreme grinding and crushing of existing rock along geological fault zones due to tectonic forces. The term "tán thạch" is a direct translation of this geological concept.

Usage Examples

• Noun:
  • Các nhà địa chất tìm thấy tán thạch dọc theo đứt gãy. (Geologists found mylonite along the fault line.)
  • Tán thạch cho thấy bằng chứng về sự biến dạng mạnh mẽ. (Mylonite shows evidence of intense deformation.)

Advanced Usage

• The term is highly specialized and used almost exclusively in academic, geological, and mineralogical contexts to describe rock texture and formation history.

Variants and Related Words

• Đá biến chất (n): Metamorphic rock. This is the broader category to which "tán thạch" belongs.
  • Đá hoa cương và tán thạch đều là đá biến chất. (Marble and mylonite are both metamorphic rocks.)

Synonyms

• Mylonite: The direct and only precise English equivalent.
• Fault rock: A more general term for rocks formed in fault zones, which includes mylonite.

Related Terms (Geological Context)

• Đứt gãy (n): Fault. The geological structure where mylonite typically forms.
• Biến dạng dẻo (n): Ductile deformation. The type of deformation that creates mylonite.