sedimentary
Gravel and Pebbles
Unconsolidated rock fragments / detrital sediment
Composed of assorted small rock fragments and minerals, hardness varies by constituent mineral (typically Mohs 6-7 for quartz-rich gravel), rounded to sub-angular shapes due to weathering and transport.
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Physical properties
Composed of assorted small rock fragments and minerals, hardness varies by constituent mineral (typically Mohs 6-7 for quartz-rich gravel), rounded to sub-angular shapes due to weathering and transport.
Formation & geological history
Formed through the weathering and erosion of larger parent rocks, followed by the transport and deposition by water, wind, or glaciers.
Uses & applications
Widely used in construction, road surfacing, driveway cover, landscaping, and drainage applications.
Geological facts
Gravel is classified by particle size ranging from granules to boulders, with standard grades defined by various geological and engineering scales.
Field identification & locations
Found abundantly in riverbeds, glacial outwash plains, alluvial fans, and beaches worldwide.
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