sedimentary
Sandstone (likely Arkosic or Lithic Sandstone)
Arenite (SiO2 based with mineral inclusions)
Hardness: 6-7 (individual grains); Color: Tan, beige, or light brown; Luster: Dull/Earthy; Crystal Structure: Clastic texture with visible sand-sized grains; Specific Gravity: 2.2 - 2.8
- Hardness
- 6-7 (individual grains)
- Color
- Tan, beige, or light brown
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 (individual grains); Color: Tan, beige, or light brown; Luster: Dull/Earthy; Crystal Structure: Clastic texture with visible sand-sized grains; Specific Gravity: 2.2 - 2.8
Formation & geological history
Formed from the accumulation and cementation of sand-sized mineral grains or rock fragments (clasts). Typically forms in desert, river, or coastal environments over millions of years.
Uses & applications
Commonly used as a building material, in the manufacture of glass (if high silica), and as a reservoir rock for oil, gas, and groundwater.
Geological facts
Sandstone makes up about 20% to 25% of all sedimentary rocks on Earth. It is famous for creating dramatic landscapes like the Grand Canyon and Antelope Canyon.
Field identification & locations
Identify in the field by its 'sandpaper' feel; if you rub it, small grains may flake off. Look for visible layering (bedding). It is found globally in sedimentary basins.
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