sedimentary
Breccia
Clastic sedimentary rock
AI-generated identification · may be incorrectHardness varies by fragments (typically Mohs 6-7 for quartz fragments), multicolored, dull to vitreous luster, composed of angular clasts cemented in a finer matrix, no cleavage.
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Physical properties
Hardness varies by fragments (typically Mohs 6-7 for quartz fragments), multicolored, dull to vitreous luster, composed of angular clasts cemented in a finer matrix, no cleavage.
Formation & geological history
Formed through the cementation of angular rock fragments in tectonic fault zones, volcanic vents, or landslide debris deposits.
Uses & applications
Used locally as decorative architectural stone, facing material, and in landscaping or gravel aggregates.
Geological facts
The angular shape of the clasts indicates they traveled a very short distance from their source before deposition.
Field identification & locations
Identified easily by visible, interlocking angular fragments embedded within a distinct fine-grained matrix; found worldwide.
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