Conglomerate

Physical Properties

Hardness: 6-7 (based on clasts), Color: Mottled brown/grey, Luster: Dull/Earthy, Crystal Structure: Clastic, Cleavage: None, Specific Gravity: 2.6-2.8

Formation & Geological History

Formed by the lithification of rounded gravel and pebbles in high-energy environments like river beds or beaches. Geological age varies widely.

Uses & Applications

Primarily used as a decorative stone in construction, heavy aggregate for concrete, and as a geological indicator of ancient river systems.

Geological Facts

Conglomerate is essentially 'nature's concrete.' It tells a story of ancient water movement powerful enough to tumble and round stones.

Field Identification & Locations

Identify by the presence of rounded rock fragments (clasts) larger than 2mm cemented in a finer matrix. Found in sedimentary basins worldwide.

Identified on: 5/9/2026

Mode: Standard