katamorphism

/,kætə'mɔ:fizm/

Thân thiện

A geologist examines the katamorphism of a rock sample near a cliff face.

Definition

1. Noun (Geology):
   • A type of metamorphism: Katamorphism is a geological process of metamorphism that occurs at or relatively near the Earth's surface. It involves the chemical breakdown and simplification of complex minerals into simpler ones, often due to weathering and low-pressure conditions.

Usage Examples

• Noun:
  • The rock's altered state was attributed to katamorphism near the surface.
  • Katamorphism is responsible for the formation of many clay minerals from feldspars.

Advanced Usage

• Scientific Context: The term is used in specialized geological literature to describe surface-level destructive metamorphic processes, often contrasted with (constructive metamorphism at depth).
  • The study focused on the katamorphism of basaltic rocks in the region.

Variants and Related Words

• Anamorphism (n): The opposite geological process to katamorphism; metamorphism at depth that forms more complex minerals from simpler ones.
• Metamorphism (n): The general process by which the structure and mineral content of rocks change due to heat, pressure, and chemical processes.

Synonyms

• Destructive metamorphism: A descriptive synonym emphasizing the breakdown aspect.
• Weathering (in a broad, chemical sense): While not a perfect synonym, weathering is a key surface process involved in katamorphism.

Related Terms

• Diagenesis: The physical and chemical changes occurring during the conversion of sediment to sedimentary rock, a related near-surface process.
• Hydrothermal alteration: Mineral changes due to hot water, which can be a type of katamorphic process.

Học thuật

Noun

1. metamorphism that occurs at or near the earth's surface; breaks down complex minerals into simpler ones