sedimentary
Limestone and Quartz Gravel with Petrified Wood
Sedimentary gravel aggregate and fossilized wood
Hardness varies from 3 (calcite/limestone) to 7 (quartz); colors range from white, grey, and tan to dark brown and black; luster is dull to vitreous; heterogeneous mixture of rock fragments.
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Physical properties
Hardness varies from 3 (calcite/limestone) to 7 (quartz); colors range from white, grey, and tan to dark brown and black; luster is dull to vitreous; heterogeneous mixture of rock fragments.
Formation & geological history
Formed through the accumulation and weathering of sedimentary rock formations, with associated organic material undergoing permineralization over millions of years.
Uses & applications
Commonly used in landscaping, ground cover, drainage aggregate, and construction fill.
Geological facts
Landscape gravel often contains a mix of durable local rocks like limestone, dolomite, and quartz, occasionally featuring accidental inclusions of ancient organic remains like petrified wood.
Field identification & locations
Easily identified by the mixed composition of angular to sub-rounded stone fragments commonly found in decorative landscaping beds.
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