sedimentary

Asphalt / Bituminous Aggregate

Bituminous mixture (Hydrocarbon-based sediment)

AI-generated identification · may be incorrect

Hardness: 1-2.5 (Mohs); Color: Black or dark charcoal grey; Luster: Dull to sub-metallic; Structure: Often amorphous or clastic; Specific Gravity: Approx 1.1–1.5.

Hardness: 1-2
Color: Black or dark charcoal grey
Luster: Dull to sub-metallic

Identified April 11, 2026More sedimentary →

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Physical properties

Hardness: 1-2.5 (Mohs); Color: Black or dark charcoal grey; Luster: Dull to sub-metallic; Structure: Often amorphous or clastic; Specific Gravity: Approx 1.1–1.5.

Formation & geological history

Formed from the natural or industrial solidification of bitumen mixed with mineral aggregates (sand, gravel). Naturally occurring bitumen forms from the decomposition of ancient organic matter under heat and pressure over millions of years.

Uses & applications

Primary use is in road construction, roofing, and waterproofing. It acts as a binder in pavement.

Geological facts

Natural asphalt has been used since ancient times. The Sumerians used it as mortar for brickwork, and it was used by Egyptians for mummification preservation.

Field identification & locations

Identify by its dark color, slight oily smell when heated, and tendency to crumble or soften under high heat. Found worldwide near oil-producing regions or as common road debris.