sedimentary
Asphalt concrete
Anthropogenic conglomerate
Dark black to gray matrix with embedded rocks (aggregate) of varying sizes, sand, and fines. Relatively soft matrix depending on temperature. Dull luster.
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Physical properties
Dark black to gray matrix with embedded rocks (aggregate) of varying sizes, sand, and fines. Relatively soft matrix depending on temperature. Dull luster.
Formation & geological history
Manufactured material created by mixing crushed stone, sand, or gravel with liquid asphalt cement. Formed artificially in modern times for construction.
Uses & applications
Used primarily for road construction, paving driveways, and parking lots.
Geological facts
Also known simply as blacktop, asphalt, or tarmac. It is highly recyclable and one of the most recycled materials in the world.
Field identification & locations
Easily identified by its black, tar-like matrix holding together variously sized lighter-colored aggregate stones. Common in urban and suburban environments.
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