Definition

1. Noun:
   • A hard coarse-grained siliceous sandstone: "Gritrock" is a type of sedimentary rock, specifically a sandstone characterized by its hardness, coarse grain size, and high silica (quartz) content. It is often used as a building or paving stone.

Usage Examples

• Noun:
  • The old mill was constructed from locally quarried gritrock.
  • Geologists identified the cliff face as a layer of gritrock.

Advanced Usage

• As a geological term: Used to describe a specific lithology in stratigraphy.
  • The Carboniferous period in this region is known for its thick gritrock formations.

Variants and Related Words

• Gritstone (n): A synonym for gritrock.
  • Gritstone is commonly used for millstones and roofing.
• Sandstone (n): The broader category of sedimentary rock to which gritrock belongs.
  • Sandstone can vary from fine-grained to coarse-grained like gritrock.

Synonyms

• Gritstone: A direct synonym.
• Arenite (specifically a coarse quartz arenite): A more technical geological term for sandstone.

Notes

• "Gritrock" is a compound noun formed from "grit" (meaning small, hard particles of stone or sand) and "rock." It refers specifically to the rock type itself, not to individual particles.

Noun

1. a hard coarse-grained siliceous sandstone