sedimentary
Conglomerate
Conglomerate (Sedimentary Rock)
AI-generated identification · may be incorrectHardness: 2-3 (clasts may be harder), Color: Brown, gray, or greenish with visible clasts, Luster: Dull or earthy, Structure: Clastic with rounded grains, Cleavage: None
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Physical properties
Hardness: 2-3 (clasts may be harder), Color: Brown, gray, or greenish with visible clasts, Luster: Dull or earthy, Structure: Clastic with rounded grains, Cleavage: None
Formation & geological history
Formed by the lithification of rounded gravel and pebbles, often in high-energy environments like riverbeds, beaches, or alluvial fans.
Uses & applications
Used primarily in the construction industry as coarse aggregate for concrete and road projects; occasionally used as decorative stone.
Geological facts
Conglomerates are often dubbed 'puddingstone' because they look like a mixture of raisins and nuts in a pudding. They require high water energy to transport the heavy rounded stones found within them.
Field identification & locations
Identify by the presence of rounded, water-worn pebbles or cobbles cemented within a finer-grained matrix. Commonly found in old river drainage basins.
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