sedimentary
Red Sandstone
Clastic Sedimentary Rock
AI-generated identification · may be incorrectHardness of 6-7 (quartz grains). Color is reddish-brown due to iron oxide. Dull to vitreous luster.
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Physical properties
Hardness of 6-7 (quartz grains). Color is reddish-brown due to iron oxide. Dull to vitreous luster.
Formation & geological history
Formed from compressed quartz and feldspar sand grains cemented by iron oxides over millions of years.
Uses & applications
Used widely in historic and modern building construction, paving, and landscaping.
Geological facts
Red coloration indicates deposition in a well-oxygenated terrestrial environment, often ancient deserts.
Field identification & locations
Identify by visible sand grains and characteristic reddish hue. Common worldwide in sedimentary basins.
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