traprock

A geologist examines a sample of traprock in the field.

Definition

1. Noun:
   • A type of dark-colored, fine-grained igneous rock: "traprock" refers to a dense, dark rock formed from cooled magma, commonly used in construction for roadbeds, railroad ballast, and concrete aggregate. It is also known as "trap rock" or simply "trap."

Usage Examples

• Noun:
  • The construction crew used crushed traprock as a base for the new highway. (A dark igneous rock for road construction.)
  • Traprock is prized for its hardness and durability in building projects. (The rock's properties make it valuable for infrastructure.)

Advanced Usage

• "traprock quarry": a mining site where traprock is extracted.

  • The traprock quarry near the river supplies stone for local concrete plants. (A location where traprock is mined.)

• "traprock formation": a geological layer or structure composed of traprock.

  • The cliffs along the coast are a traprock formation from ancient volcanic activity. (A geological feature made of traprock.)

Variants and Related Words

• Trap (n): a shortened form of "traprock," also referring to the same type of rock.

  • The old railway was built on a bed of trap. (Traprock used as ballast.)

• Traprocky (adj): having the characteristics of traprock.

  • The soil here is traprocky, making it difficult to dig. (Containing or resembling traprock.)

Synonyms

• Basalt: a common volcanic rock similar to traprock in color and density.
• Dolerite: a dark, fine-grained igneous rock often classified as traprock.

Phrasal Verbs

• (None commonly associated with "traprock" as a noun; it is not used as a verb.)

Related Idioms

• (No idioms directly involve "traprock," as it is a technical geological term.)