sedimentary
Generic Pebble / Small Rock Fragment
Lithic fragment / Weathered rock particle
Hardness varies depending on mineral composition (typically Mohs 5-7 for quartz-rich rocks); Color ranges from grey to brown; Luster is dull to earthy; Crystal structure is amorphous or microcrystalline due to weathering and abrasion.
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Physical properties
Hardness varies depending on mineral composition (typically Mohs 5-7 for quartz-rich rocks); Color ranges from grey to brown; Luster is dull to earthy; Crystal structure is amorphous or microcrystalline due to weathering and abrasion.
Formation & geological history
Formed through the breakdown, weathering, and transport of larger parent rocks via water, wind, or glacial action over geological time scales.
Uses & applications
Used in general landscaping, road construction aggregates, or as geological samples for basic educational purposes.
Geological facts
Small pebbles like this often travel vast distances in riverbeds, becoming rounded due to the continuous abrasive action of water and other sediments.
Field identification & locations
Commonly found in stream beds, gravel deposits, and soils worldwide. Identification typically requires microscopic or chemical analysis if a precise parent rock type is needed.
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