sedimentary
River Pebbles
Polymictic Lithic Pebbles
AI-generated identification · may be incorrectVariable hardness depending on mineral composition (Mohs 5-7), smooth rounded texture, diverse colors including gray, brown, and banded patterns, vitreous to dull luster.
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Physical properties
Variable hardness depending on mineral composition (Mohs 5-7), smooth rounded texture, diverse colors including gray, brown, and banded patterns, vitreous to dull luster.
Formation & geological history
Formed through the mechanical weathering, erosion, and water-transport rounding of various parent rocks in riverbeds over thousands to millions of years.
Uses & applications
Commonly used in landscaping, decorative garden design, aquarium substrates, and construction aggregate.
Geological facts
River pebbles are smoothed by the continuous abrasive action of water tumbling them against other rocks along river channels.
Field identification & locations
Found universally in stream beds, riverbanks, and glacial outwash plains. Easily identified by their smooth, water-worn surfaces.
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