sedimentary
Red Sandstone
Quartz Arenite / Lithic Sandstone
AI-generated identification · may be incorrectHardness of 6-7 on Mohs scale due to quartz content; reddish-brown color from iron oxide cement; dull to earthy luster; clastic texture with visible sand grains.
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Physical properties
Hardness of 6-7 on Mohs scale due to quartz content; reddish-brown color from iron oxide cement; dull to earthy luster; clastic texture with visible sand grains.
Formation & geological history
Formed from the accumulation, compaction, and cementation of mineral particles or rock fragments, often in desert or river environments over millions of years.
Uses & applications
Widely used as a dimension stone in construction, building facades, paving, and landscaping.
Geological facts
The red color comes from hematite or goethite acting as a natural cement between sand grains. Many famous historical monuments and ancient temples are built from red sandstone.
Field identification & locations
Easily identified in the field by its grainy texture and distinct reddish hue; common in sedimentary basins worldwide, including parts of East Africa.
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Fossil-bearing concretion, possibly containing a fossil shell or other organic inclusion
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Sedimentary
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
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Shale
Fissile Sedimentary Rock
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Sandstone
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Shale
Clastic sedimentary rock
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