sedimentary
Red Siltstone
Clastic Sedimentary Rock
AI-generated identification · may be incorrectHardness of 3 to 4 on the Mohs scale, reddish-brown color due to iron oxides, dull luster, and very fine-grained texture.
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Physical properties
Hardness of 3 to 4 on the Mohs scale, reddish-brown color due to iron oxides, dull luster, and very fine-grained texture.
Formation & geological history
Formed by the accumulation and lithification of silt-sized mineral particles, typically in marine, lake, or river floodplain environments.
Uses & applications
Used locally as decorative stone, in landscaping, and occasionally as a low-grade fill material in construction.
Geological facts
The red coloration comes from hematite acting as a natural cement binding the fine silt grains together.
Field identification & locations
Identify by its gritty feel between teeth despite the smooth, fine appearance, and its distinctive reddish-brown earthy hue.
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