petrography

Definition

1. Noun:
   • The scientific study of rocks: "petrography" is the branch of geology that deals with the description and systematic classification of rocks, especially through the examination of their mineral composition, texture, and structure in hand specimens or thin sections under a microscope.

Usage Examples

• (The scientific description and classification of rock types.)
• (The systematic analysis of rock composition.)

Advanced Usage

• "Descriptive petrography": a subfield focusing on the detailed description of rock characteristics without interpretation.

  • Descriptive petrography involves recording grain size, shape, and arrangement. (The observational aspect of rock study.)

• "Quantitative petrography": using measurements and statistics to analyze rock properties.

  • Quantitative petrography can determine the percentage of each mineral in a thin section. (Numerical analysis of rock components.)

Variants and Related Words

• Petrographic (adj): relating to petrography.

  • The petrographic analysis revealed a high quartz content. (Pertaining to the scientific description of rocks.)

• Petrographer (n): a scientist who specializes in petrography.

  • The petrographer examined the volcanic rock under the microscope. (A geologist focused on rock description.)

Synonyms

• Rock description: the systematic characterization of rock types.
• Lithology: the study of the physical characteristics of rocks (often used interchangeably but can be broader).

Related Idioms