sedimentary
Pebble
Lithic fragment (Quartzite or general rock pebble)
Hardness: Varies (typically 7 if quartz-based); Color: Grayish brown; Luster: Dull to sub-vitreous; Structure: Smooth, rounded clast
- Hardness
- Varies (typically 7 if quartz-based)
- Color
- Grayish brown
- Luster
- Dull to sub-vitreous
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Physical properties
Hardness: Varies (typically 7 if quartz-based); Color: Grayish brown; Luster: Dull to sub-vitreous; Structure: Smooth, rounded clast
Formation & geological history
Formed through the mechanical weathering, transportation, and water-erosion (rounding) of larger parent rocks in rivers, streams, or beach environments over geological time scales.
Uses & applications
Used in landscaping, decorative ground cover, walkways, and construction aggregate.
Geological facts
Pebbles are classified by their grain size in geology, specifically clasts measuring between 4 and 64 millimeters in diameter.
Field identification & locations
Commonly found in riverbeds, lake shores, and beaches worldwide. Identified by its smooth, rounded shape resulting from abrasion during transport.
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Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
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Quartz pebble
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Sedimentary Sandstone
Arenite (Sedimentary Rock)
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Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
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Banded Siltstone / Mudstone Pebble
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