Definition

Noun: A type of sedimentary rock composed primarily of coarse-grained fragments, such as pebbles, cobbles, or boulders, which are cemented together. These rocks are classified based on the size of their constituent particles.

Usage

The term "rudaceous rock" is a technical geological classification. It is used to describe and categorize rocks based on their grain size and composition within the broader category of clastic sedimentary rocks.

Examples

• Noun:
  • Conglomerate is a common type of rudaceous rock.
  • The cliff face exposed a thick layer of rudaceous rock, indicating a high-energy depositional environment like an ancient riverbed.

Advanced Usage

• In geological description: The term is used in formal rock descriptions and classifications.
  • The stratigraphic column shows a sequence transitioning from fine mudstones to coarse rudaceous rocks.

Variants and Related Words

• Rudite (n): A synonym for rudaceous rock.
• Conglomerate (n): A specific type of rudaceous rock where the fragments are rounded.
• Breccia (n): A specific type of rudaceous rock where the fragments are angular.

Synonyms

• Clastic rock (broader category): A sedimentary rock composed of fragments (clasts) of pre-existing minerals and rock.
• Coarse-grained sedimentary rock

Antonyms

• Arenaceous rock: A sedimentary rock composed of sand-sized particles (e.g., sandstone).
• Argillaceous rock: A sedimentary rock composed of clay or silt-sized particles (e.g., shale, mudstone).

Noun

1. a sedimentary rock formed of coarse-grained material