sedimentary
Sandstone (Red / Iron-stained)
Arenite (primarily SiO2 with Fe2O3 cement)
AI-generated identification · may be incorrectHardness 6-7 on Mohs scale; reddish-brown to terracotta color; earthy to dull luster; clastic granular texture.
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Physical properties
Hardness 6-7 on Mohs scale; reddish-brown to terracotta color; earthy to dull luster; clastic granular texture.
Formation & geological history
Formed through the compaction and cementation of mineral particles (sand grains) in arid, desert, or fluvial environments, with iron oxides imparting the red hue.
Uses & applications
Extensively used as a building stone, paving material, architectural facade, and aggregate in construction.
Geological facts
Red sandstone is famous worldwide for creating dramatic landscape formations such as the Grand Canyon, Red Rocks, and Petra in Jordan.
Field identification & locations
Identified in the field by its distinct gritty sandpaper-like feel, visible sand grains, and lack of effervescence with dilute acid.
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