sedimentary
Sandstone
Arenite (SiO2 based)
AI-generated identification · may be incorrectHardness: 6-7 (Mohs scale), Color: tan to yellowish-brown, Luster: dull/earthy, Texture: clastic (gritty like sandpaper), Composition: primarily quartz and feldspar grains.
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Physical properties
Hardness: 6-7 (Mohs scale), Color: tan to yellowish-brown, Luster: dull/earthy, Texture: clastic (gritty like sandpaper), Composition: primarily quartz and feldspar grains.
Formation & geological history
Formed through the accumulation and cementation of mineral particles or rock fragments (detritus) in environments like deserts, river deltas, or beaches. Geological age can range from Precambrian to Holocene.
Uses & applications
Widely used as an architectural stone for building facades, paving, and decorative garden features. Historically used for making grindstones and tools.
Geological facts
Sandstone represents about 20% of all sedimentary rocks on Earth. It acts as a primary reservoir for underground water and oil because of its porosity and permeability.
Field identification & locations
Identify in the field by its gritty texture and visible layers (bedding). It will often feel like sandpaper to the touch and will not fizz with weak acid unless the cement is calcareous.
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Generic Pebble / Rock Fragment
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Sedimentary Sandstone
Arenite (Sedimentary Rock)
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Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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